diff --git a/src/main/java/org/codelibs/fess/app/job/AllJobScheduler.java b/src/main/java/org/codelibs/fess/app/job/AllJobScheduler.java
index a77e86399..06471d79b 100644
--- a/src/main/java/org/codelibs/fess/app/job/AllJobScheduler.java
+++ b/src/main/java/org/codelibs/fess/app/job/AllJobScheduler.java
@@ -66,7 +66,7 @@ public class AllJobScheduler implements LaJobScheduler {
 
     @Override
     public void schedule(final LaCron cron) {
-        schedulerTime = System.currentTimeMillis();
+        schedulerTime = systemHelper.getCurrentTimeAsLong();
         scheduledJobService.start(cron);
 
         final String myName = fessConfig.getSchedulerTargetName();
@@ -81,7 +81,7 @@ public class AllJobScheduler implements LaJobScheduler {
             if (logger.isDebugEnabled()) {
                 logger.debug("Updating scheduled jobs. time:{}", schedulerTime);
             }
-            final long now = System.currentTimeMillis();
+            final long now = systemHelper.getCurrentTimeAsLong();
             scheduledJobService.getScheduledJobListAfter(schedulerTime).forEach(scheduledJob -> {
                 if (logger.isDebugEnabled()) {
                     logger.debug("Updating job schedule:{}", scheduledJob.getName());
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/esreq/AdminEsreqAction.java b/src/main/java/org/codelibs/fess/app/web/admin/esreq/AdminEsreqAction.java
index 78f4ef4a9..5535bcf6e 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/esreq/AdminEsreqAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/esreq/AdminEsreqAction.java
@@ -104,15 +104,16 @@ public class AdminEsreqAction extends FessAdminAction {
                     }
                     throw e1;
                 }
-                return asStream("es_" + System.currentTimeMillis() + ".json").contentTypeOctetStream().stream(out -> {
-                    try (final InputStream in = new FileInputStream(tempFile)) {
-                        out.write(in);
-                    } finally {
-                        if (tempFile.exists() && !tempFile.delete()) {
-                            logger.warn("Failed to delete {}", tempFile.getAbsolutePath());
-                        }
-                    }
-                });
+                return asStream("es_" + ComponentUtil.getSystemHelper().getCurrentTimeAsLong() + ".json").contentTypeOctetStream()
+                        .stream(out -> {
+                            try (final InputStream in = new FileInputStream(tempFile)) {
+                                out.write(in);
+                            } finally {
+                                if (tempFile.exists() && !tempFile.delete()) {
+                                    logger.warn("Failed to delete {}", tempFile.getAbsolutePath());
+                                }
+                            }
+                        });
             } catch (final Exception e) {
                 logger.warn("Failed to process request file: {}", form.requestFile.getFileName(), e);
                 throwValidationError(messages -> messages.addErrorsInvalidHeaderForRequestFile(GLOBAL, e.getMessage()),
diff --git a/src/main/java/org/codelibs/fess/app/web/base/login/AzureAdCredential.java b/src/main/java/org/codelibs/fess/app/web/base/login/AzureAdCredential.java
index f0145f43f..3bc5c1a1b 100644
--- a/src/main/java/org/codelibs/fess/app/web/base/login/AzureAdCredential.java
+++ b/src/main/java/org/codelibs/fess/app/web/base/login/AzureAdCredential.java
@@ -116,7 +116,7 @@ public class AzureAdCredential implements LoginCredential, FessCredential {
 
         @Override
         public boolean refresh() {
-            if (authResult.getExpiresAfter() < System.currentTimeMillis()) {
+            if (authResult.getExpiresAfter() < ComponentUtil.getSystemHelper().getCurrentTimeAsLong()) {
                 return false;
             }
             final AzureAdAuthenticator authenticator = ComponentUtil.getComponent(AzureAdAuthenticator.class);
diff --git a/src/main/java/org/codelibs/fess/crawler/FessCrawlerThread.java b/src/main/java/org/codelibs/fess/crawler/FessCrawlerThread.java
index 4a489044c..730cd82a0 100644
--- a/src/main/java/org/codelibs/fess/crawler/FessCrawlerThread.java
+++ b/src/main/java/org/codelibs/fess/crawler/FessCrawlerThread.java
@@ -53,6 +53,7 @@ import org.codelibs.fess.helper.CrawlingInfoHelper;
 import org.codelibs.fess.helper.DuplicateHostHelper;
 import org.codelibs.fess.helper.IndexingHelper;
 import org.codelibs.fess.helper.PermissionHelper;
+import org.codelibs.fess.helper.SystemHelper;
 import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.codelibs.fess.util.ComponentUtil;
 import org.codelibs.fess.util.DocumentUtil;
@@ -69,7 +70,8 @@ public class FessCrawlerThread extends CrawlerThread {
     protected boolean isContentUpdated(final CrawlerClient client, final UrlQueue<?> urlQueue) {
         if (ComponentUtil.getFessConfig().isIncrementalCrawling()) {
 
-            final long startTime = System.currentTimeMillis();
+            final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+            final long startTime = systemHelper.getCurrentTimeAsLong();
 
             final FessConfig fessConfig = ComponentUtil.getFessConfig();
             final CrawlingConfigHelper crawlingConfigHelper = ComponentUtil.getCrawlingConfigHelper();
@@ -119,7 +121,7 @@ public class FessCrawlerThread extends CrawlerThread {
                 }
 
                 final Date expires = DocumentUtil.getValue(document, fessConfig.getIndexFieldExpires(), Date.class);
-                if (expires != null && expires.getTime() < System.currentTimeMillis()) {
+                if (expires != null && expires.getTime() < systemHelper.getCurrentTimeAsLong()) {
                     final Object idValue = document.get(fessConfig.getIndexFieldId());
                     if (idValue != null && !indexingHelper.deleteDocument(searchEngineClient, idValue.toString())) {
                         logger.debug("Failed to delete expired document: {}", url);
@@ -160,7 +162,7 @@ public class FessCrawlerThread extends CrawlerThread {
 
                     log(logHelper, LogType.NOT_MODIFIED, crawlerContext, urlQueue);
 
-                    responseData.setExecutionTime(System.currentTimeMillis() - startTime);
+                    responseData.setExecutionTime(systemHelper.getCurrentTimeAsLong() - startTime);
                     responseData.setParentUrl(urlQueue.getParentUrl());
                     responseData.setSessionId(crawlerContext.getSessionId());
                     responseData.setHttpStatusCode(org.codelibs.fess.crawler.Constants.NOT_MODIFIED_STATUS);
diff --git a/src/main/java/org/codelibs/fess/ds/DataStoreFactory.java b/src/main/java/org/codelibs/fess/ds/DataStoreFactory.java
index 1a4965839..4dea5d455 100644
--- a/src/main/java/org/codelibs/fess/ds/DataStoreFactory.java
+++ b/src/main/java/org/codelibs/fess/ds/DataStoreFactory.java
@@ -37,6 +37,7 @@ import org.apache.logging.log4j.Logger;
 import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.helper.PluginHelper;
+import org.codelibs.fess.util.ComponentUtil;
 import org.codelibs.fess.util.ResourceUtil;
 import org.w3c.dom.Document;
 import org.w3c.dom.NamedNodeMap;
@@ -71,7 +72,7 @@ public class DataStoreFactory {
     }
 
     public String[] getDataStoreNames() {
-        final long now = System.currentTimeMillis();
+        final long now = ComponentUtil.getSystemHelper().getCurrentTimeAsLong();
         if (now - lastLoadedTime > 60000L) {
             final List<String> nameList = loadDataStoreNameList();
             dataStoreNames = nameList.toArray(n -> new String[nameList.size()]);
diff --git a/src/main/java/org/codelibs/fess/ds/callback/FileListIndexUpdateCallbackImpl.java b/src/main/java/org/codelibs/fess/ds/callback/FileListIndexUpdateCallbackImpl.java
index 8f1575d2e..f0e7b7e43 100644
--- a/src/main/java/org/codelibs/fess/ds/callback/FileListIndexUpdateCallbackImpl.java
+++ b/src/main/java/org/codelibs/fess/ds/callback/FileListIndexUpdateCallbackImpl.java
@@ -54,6 +54,7 @@ import org.codelibs.fess.helper.CrawlerStatsHelper;
 import org.codelibs.fess.helper.CrawlerStatsHelper.StatsAction;
 import org.codelibs.fess.helper.CrawlerStatsHelper.StatsKeyObject;
 import org.codelibs.fess.helper.IndexingHelper;
+import org.codelibs.fess.helper.SystemHelper;
 import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.codelibs.fess.util.ComponentUtil;
 import org.lastaflute.di.core.SingletonLaContainer;
@@ -212,14 +213,15 @@ public class FileListIndexUpdateCallbackImpl implements IndexUpdateCallback {
 
     protected String processRequest(final DataStoreParams paramMap, final Map<String, Object> dataMap, final String url,
             final CrawlerClient client) {
-        final long startTime = System.currentTimeMillis();
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+        final long startTime = systemHelper.getCurrentTimeAsLong();
         final CrawlerStatsHelper crawlerStatsHelper = ComponentUtil.getCrawlerStatsHelper();
         final StatsKeyObject keyObj = paramMap.get(Constants.CRAWLER_STATS_KEY) instanceof final StatsKeyObject sko ? sko : null;
         try (final ResponseData responseData = client.execute(RequestDataBuilder.newRequestData().get().url(url).build())) {
             if (responseData.getRedirectLocation() != null) {
                 return responseData.getRedirectLocation();
             }
-            responseData.setExecutionTime(System.currentTimeMillis() - startTime);
+            responseData.setExecutionTime(systemHelper.getCurrentTimeAsLong() - startTime);
             if (dataMap.containsKey(Constants.SESSION_ID)) {
                 responseData.setSessionId((String) dataMap.get(Constants.SESSION_ID));
             } else {
diff --git a/src/main/java/org/codelibs/fess/ds/callback/IndexUpdateCallbackImpl.java b/src/main/java/org/codelibs/fess/ds/callback/IndexUpdateCallbackImpl.java
index 1cc5d1b77..6262ce330 100644
--- a/src/main/java/org/codelibs/fess/ds/callback/IndexUpdateCallbackImpl.java
+++ b/src/main/java/org/codelibs/fess/ds/callback/IndexUpdateCallbackImpl.java
@@ -75,7 +75,7 @@ public class IndexUpdateCallbackImpl implements IndexUpdateCallback {
         final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
         systemHelper.calibrateCpuLoad();
 
-        final long startTime = System.currentTimeMillis();
+        final long startTime = systemHelper.getCurrentTimeAsLong();
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
         final SearchEngineClient searchEngineClient = ComponentUtil.getSearchEngineClient();
 
@@ -122,7 +122,7 @@ public class IndexUpdateCallbackImpl implements IndexUpdateCallback {
             docList.add(ingest(paramMap, dataMap));
             final long contentSize = indexingHelper.calculateDocumentSize(dataMap);
             docList.addContentSize(contentSize);
-            final long processingTime = System.currentTimeMillis() - startTime;
+            final long processingTime = systemHelper.getCurrentTimeAsLong() - startTime;
             docList.addProcessingTime(processingTime);
             if (logger.isDebugEnabled()) {
                 logger.debug("Added the document({}, {}ms). The number of a document cache is {}.",
diff --git a/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java b/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java
index 24e10e590..8f161550e 100644
--- a/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java
+++ b/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java
@@ -66,6 +66,7 @@ import org.codelibs.fess.exception.ResultOffsetExceededException;
 import org.codelibs.fess.exception.SearchQueryException;
 import org.codelibs.fess.helper.DocumentHelper;
 import org.codelibs.fess.helper.QueryHelper;
+import org.codelibs.fess.helper.SystemHelper;
 import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.codelibs.fess.query.QueryFieldConfig;
 import org.codelibs.fess.util.BooleanFunction;
@@ -755,7 +756,8 @@ public class SearchEngineClient implements Client {
 
     protected void waitForYellowStatus(final FessConfig fessConfig) {
         Exception cause = null;
-        final long startTime = System.currentTimeMillis();
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+        final long startTime = systemHelper.getCurrentTimeAsLong();
         for (int i = 0; i < maxEsStatusRetry; i++) {
             try {
                 final ClusterHealthResponse response = client.admin().cluster().prepareHealth().setWaitForYellowStatus().execute()
@@ -784,7 +786,7 @@ public class SearchEngineClient implements Client {
         }
         final String message =
                 "Fesen (" + SystemUtil.getSearchEngineHttpAddress() + ") is not available. Check the state of your Fesen cluster ("
-                        + clusterName + ") in " + (System.currentTimeMillis() - startTime) + "ms.";
+                        + clusterName + ") in " + (systemHelper.getCurrentTimeAsLong() - startTime) + "ms.";
         throw new ContainerInitFailureException(message, cause);
     }
 
@@ -924,21 +926,23 @@ public class SearchEngineClient implements Client {
 
     protected <T> T get(final String index, final String id, final SearchCondition<GetRequestBuilder> condition,
             final SearchResult<T, GetRequestBuilder, GetResponse> searchResult) {
-        final long startTime = System.currentTimeMillis();
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+        final long startTime = systemHelper.getCurrentTimeAsLong();
 
         GetResponse response = null;
         final GetRequestBuilder requestBuilder = client.prepareGet(index, id);
         if (condition.build(requestBuilder)) {
             response = requestBuilder.execute().actionGet(ComponentUtil.getFessConfig().getIndexSearchTimeout());
         }
-        final long execTime = System.currentTimeMillis() - startTime;
+        final long execTime = systemHelper.getCurrentTimeAsLong() - startTime;
 
         return searchResult.build(requestBuilder, execTime, OptionalEntity.ofNullable(response, () -> {}));
     }
 
     public <T> T search(final String index, final SearchCondition<SearchRequestBuilder> condition,
             final SearchResult<T, SearchRequestBuilder, SearchResponse> searchResult) {
-        final long startTime = System.currentTimeMillis();
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+        final long startTime = systemHelper.getCurrentTimeAsLong();
 
         SearchResponse searchResponse = null;
         final SearchRequestBuilder searchRequestBuilder = client.prepareSearch(index);
@@ -966,7 +970,7 @@ public class SearchEngineClient implements Client {
                         "Failed query: " + searchRequestBuilder, e);
             }
         }
-        final long execTime = System.currentTimeMillis() - startTime;
+        final long execTime = systemHelper.getCurrentTimeAsLong() - startTime;
 
         return searchResult.build(searchRequestBuilder, execTime, OptionalEntity.ofNullable(searchResponse, () -> {}));
     }
diff --git a/src/main/java/org/codelibs/fess/exec/Crawler.java b/src/main/java/org/codelibs/fess/exec/Crawler.java
index e3d9e6011..e28c7048f 100644
--- a/src/main/java/org/codelibs/fess/exec/Crawler.java
+++ b/src/main/java/org/codelibs/fess/exec/Crawler.java
@@ -54,6 +54,7 @@ import org.codelibs.fess.helper.DataIndexHelper;
 import org.codelibs.fess.helper.DuplicateHostHelper;
 import org.codelibs.fess.helper.NotificationHelper;
 import org.codelibs.fess.helper.PathMappingHelper;
+import org.codelibs.fess.helper.SystemHelper;
 import org.codelibs.fess.helper.WebFsIndexHelper;
 import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.codelibs.fess.mylasta.mail.CrawlerPostcard;
@@ -471,8 +472,8 @@ public class Crawler {
         }
 
         final PathMappingHelper pathMappingHelper = ComponentUtil.getPathMappingHelper();
-
-        final long totalTime = System.currentTimeMillis();
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+        final long totalTime = systemHelper.getCurrentTimeAsLong();
 
         final CrawlingInfoHelper crawlingInfoHelper = ComponentUtil.getCrawlingInfoHelper();
 
@@ -494,8 +495,8 @@ public class Crawler {
             }
 
             // delete expired sessions
-            crawlingInfoService.deleteSessionIdsBefore(options.sessionId, options.name,
-                    ComponentUtil.getSystemHelper().getCurrentTimeAsLong());
+            SystemHelper systemHelper2 = ComponentUtil.getSystemHelper();
+            crawlingInfoService.deleteSessionIdsBefore(options.sessionId, options.name, systemHelper2.getCurrentTimeAsLong());
 
             final List<String> webConfigIdList = options.getWebConfigIdList();
             final List<String> fileConfigIdList = options.getFileConfigIdList();
@@ -544,7 +545,7 @@ public class Crawler {
                         errors.stream().map(s -> s.replace(" ", StringUtil.EMPTY)).collect(Collectors.joining(" ")));
             }
             writeTimeToSessionInfo(crawlingInfoHelper, Constants.CRAWLER_END_TIME);
-            crawlingInfoHelper.putToInfoMap(Constants.CRAWLER_EXEC_TIME, Long.toString(System.currentTimeMillis() - totalTime));
+            crawlingInfoHelper.putToInfoMap(Constants.CRAWLER_EXEC_TIME, Long.toString(systemHelper.getCurrentTimeAsLong() - totalTime));
 
         }
     }
diff --git a/src/main/java/org/codelibs/fess/helper/CrawlerStatsHelper.java b/src/main/java/org/codelibs/fess/helper/CrawlerStatsHelper.java
index 9ccaeb3ed..f0071e734 100644
--- a/src/main/java/org/codelibs/fess/helper/CrawlerStatsHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/CrawlerStatsHelper.java
@@ -25,6 +25,7 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.codelibs.fess.crawler.entity.UrlQueue;
 import org.codelibs.fess.taglib.FessFunctions;
+import org.codelibs.fess.util.ComponentUtil;
 import org.dbflute.optional.OptionalThing;
 
 import com.google.common.cache.CacheBuilder;
@@ -85,7 +86,7 @@ public class CrawlerStatsHelper {
             try {
                 statsCache.get(key);
             } catch (final Exception e) {
-                final StringBuilder buf = createStringBuffer(keyObj, System.currentTimeMillis());
+                final StringBuilder buf = createStringBuffer(keyObj, getCurrentTimeMillis());
                 buf.append('\t').append("action:begin");
                 buf.append('\t').append("error:").append(escapeValue(e.getLocalizedMessage()).replaceAll("\\s", " "));
                 log(buf);
@@ -102,10 +103,10 @@ public class CrawlerStatsHelper {
             try {
                 final StatsObject data = statsCache.getIfPresent(key);
                 if (data != null) {
-                    data.put(escapeValue(action), System.currentTimeMillis());
+                    data.put(escapeValue(action), getCurrentTimeMillis());
                 }
             } catch (final Exception e) {
-                final StringBuilder buf = createStringBuffer(keyObj, System.currentTimeMillis());
+                final StringBuilder buf = createStringBuffer(keyObj, getCurrentTimeMillis());
                 buf.append('\t').append("action:record");
                 buf.append('\t').append("error:").append(escapeValue(e.getLocalizedMessage()).replaceAll("\\s", " "));
                 log(buf);
@@ -125,7 +126,7 @@ public class CrawlerStatsHelper {
                     }
                 }
             } catch (final Exception e) {
-                final StringBuilder buf = createStringBuffer(keyObj, System.currentTimeMillis());
+                final StringBuilder buf = createStringBuffer(keyObj, getCurrentTimeMillis());
                 buf.append('\t').append("action:done");
                 buf.append('\t').append("error:").append(escapeValue(e.getLocalizedMessage()).replaceAll("\\s", " "));
                 log(buf);
@@ -141,7 +142,7 @@ public class CrawlerStatsHelper {
                     statsCache.invalidate(key);
                 }
             } catch (final Exception e) {
-                final StringBuilder buf = createStringBuffer(keyObj, System.currentTimeMillis());
+                final StringBuilder buf = createStringBuffer(keyObj, getCurrentTimeMillis());
                 buf.append('\t').append("action:done");
                 buf.append('\t').append("error:").append(escapeValue(e.getLocalizedMessage()).replaceAll("\\s", " "));
                 log(buf);
@@ -152,7 +153,7 @@ public class CrawlerStatsHelper {
     protected void printStats(final Object keyObj, final StatsObject data, final long begin, final boolean done) {
         final StringBuilder buf = createStringBuffer(keyObj, begin);
         if (done) {
-            buf.append('\t').append("done:").append(System.currentTimeMillis() - begin);
+            buf.append('\t').append("done:").append(getCurrentTimeMillis() - begin);
         }
         data.entrySet().stream().map(e -> escapeValue(e.getKey()) + ":" + (e.getValue().longValue() - begin)).map(s -> "\t" + s)
                 .forEach(s -> buf.append(s));
@@ -167,7 +168,7 @@ public class CrawlerStatsHelper {
                     data.increment();
                 }
             } catch (final Exception e) {
-                final StringBuilder buf = createStringBuffer(keyObj, System.currentTimeMillis());
+                final StringBuilder buf = createStringBuffer(keyObj, getCurrentTimeMillis());
                 buf.append('\t').append("action:record");
                 buf.append('\t').append("error:").append(escapeValue(e.getLocalizedMessage()).replaceAll("\\s", " "));
                 log(buf);
@@ -175,6 +176,10 @@ public class CrawlerStatsHelper {
         });
     }
 
+    protected long getCurrentTimeMillis() {
+        return ComponentUtil.getSystemHelper().getCurrentTimeAsLong();
+    }
+
     private StringBuilder createStringBuffer(final Object keyObj, final long time) {
         final StringBuilder buf = new StringBuilder(1000);
         buf.append("url:").append(getUrl(keyObj));
@@ -267,7 +272,7 @@ public class CrawlerStatsHelper {
         protected final AtomicInteger count;
 
         public StatsObject() {
-            put(BEGIN_KEY, System.currentTimeMillis());
+            put(BEGIN_KEY, ComponentUtil.getSystemHelper().getCurrentTimeAsLong());
             count = new AtomicInteger(1);
         }
 
diff --git a/src/main/java/org/codelibs/fess/helper/DataIndexHelper.java b/src/main/java/org/codelibs/fess/helper/DataIndexHelper.java
index 51bb29a73..8332b5a19 100644
--- a/src/main/java/org/codelibs/fess/helper/DataIndexHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/DataIndexHelper.java
@@ -82,7 +82,8 @@ public class DataIndexHelper {
     protected void doCrawl(final String sessionId, final List<DataConfig> configList) {
         final int multiprocessCrawlingCount = ComponentUtil.getFessConfig().getCrawlingThreadCount();
 
-        final long startTime = System.currentTimeMillis();
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+        final long startTime = systemHelper.getCurrentTimeAsLong();
 
         final IndexUpdateCallback indexUpdateCallback = ComponentUtil.getComponent(IndexUpdateCallback.class);
 
@@ -107,8 +108,6 @@ public class DataIndexHelper {
 
         }
 
-        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
-
         int startedCrawlerNum = 0;
         int activeCrawlerNum = 0;
         while (startedCrawlerNum < dataCrawlingThreadList.size()) {
@@ -160,7 +159,7 @@ public class DataIndexHelper {
         // put cralwing info
         final CrawlingInfoHelper crawlingInfoHelper = ComponentUtil.getCrawlingInfoHelper();
 
-        final long execTime = System.currentTimeMillis() - startTime;
+        final long execTime = systemHelper.getCurrentTimeAsLong() - startTime;
         crawlingInfoHelper.putToInfoMap(Constants.DATA_CRAWLING_EXEC_TIME, Long.toString(execTime));
         if (logger.isInfoEnabled()) {
             logger.info("[EXEC TIME] crawling time: {}ms", execTime);
diff --git a/src/main/java/org/codelibs/fess/helper/DocumentHelper.java b/src/main/java/org/codelibs/fess/helper/DocumentHelper.java
index 1d67e872a..9fc80971c 100644
--- a/src/main/java/org/codelibs/fess/helper/DocumentHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/DocumentHelper.java
@@ -184,14 +184,15 @@ public class DocumentHelper {
             throw new CrawlingAccessException("CrawlerClient is null for " + url);
         }
 
-        final long startTime = System.currentTimeMillis();
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+        final long startTime = systemHelper.getCurrentTimeAsLong();
         try (final ResponseData responseData = client.execute(RequestDataBuilder.newRequestData().get().url(url).build())) {
             if (responseData.getRedirectLocation() != null) {
                 final Set<RequestData> childUrlList = new HashSet<>();
                 childUrlList.add(RequestDataBuilder.newRequestData().get().url(responseData.getRedirectLocation()).build());
                 throw new ChildUrlsException(childUrlList, this.getClass().getName() + "#RedirectedFrom:" + url);
             }
-            responseData.setExecutionTime(System.currentTimeMillis() - startTime);
+            responseData.setExecutionTime(systemHelper.getCurrentTimeAsLong() - startTime);
             responseData.setSessionId(crawlingInfoId);
 
             final RuleManager ruleManager = SingletonLaContainer.getComponent(RuleManager.class);
diff --git a/src/main/java/org/codelibs/fess/helper/IndexingHelper.java b/src/main/java/org/codelibs/fess/helper/IndexingHelper.java
index 1207f1f4a..699e1db3e 100644
--- a/src/main/java/org/codelibs/fess/helper/IndexingHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/IndexingHelper.java
@@ -47,7 +47,8 @@ public class IndexingHelper {
             return;
         }
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
-        final long execTime = System.currentTimeMillis();
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+        final long execTime = systemHelper.getCurrentTimeAsLong();
         if (logger.isDebugEnabled()) {
             logger.debug("Sending {} documents to a server.", docList.size());
         }
@@ -79,10 +80,10 @@ public class IndexingHelper {
             if (logger.isInfoEnabled()) {
                 if (docList.getContentSize() > 0) {
                     logger.info("Sent {} docs (Doc:{process {}ms, send {}ms, size {}}, {})", docList.size(), docList.getProcessingTime(),
-                            (System.currentTimeMillis() - execTime), MemoryUtil.byteCountToDisplaySize(docList.getContentSize()),
+                            (systemHelper.getCurrentTimeAsLong() - execTime), MemoryUtil.byteCountToDisplaySize(docList.getContentSize()),
                             MemoryUtil.getMemoryUsageLog());
                 } else {
-                    logger.info("Sent {}  docs (Doc:{send {}ms}, {})", docList.size(), (System.currentTimeMillis() - execTime),
+                    logger.info("Sent {}  docs (Doc:{send {}ms}, {})", docList.size(), (systemHelper.getCurrentTimeAsLong() - execTime),
                             MemoryUtil.getMemoryUsageLog());
                 }
             }
diff --git a/src/main/java/org/codelibs/fess/helper/IntervalControlHelper.java b/src/main/java/org/codelibs/fess/helper/IntervalControlHelper.java
index d0b66004a..31d5dc5e1 100644
--- a/src/main/java/org/codelibs/fess/helper/IntervalControlHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/IntervalControlHelper.java
@@ -21,6 +21,7 @@ import java.util.List;
 
 import org.codelibs.core.lang.ThreadUtil;
 import org.codelibs.fess.exception.FessSystemException;
+import org.codelibs.fess.util.ComponentUtil;
 
 public class IntervalControlHelper {
 
@@ -61,7 +62,7 @@ public class IntervalControlHelper {
 
     protected Calendar getCurrentCal() {
         final Calendar cal = Calendar.getInstance();
-        cal.setTimeInMillis(System.currentTimeMillis());
+        cal.setTimeInMillis(ComponentUtil.getSystemHelper().getCurrentTimeAsLong());
         return cal;
     }
 
diff --git a/src/main/java/org/codelibs/fess/helper/SearchHelper.java b/src/main/java/org/codelibs/fess/helper/SearchHelper.java
index 10a5b7f91..630a4d43c 100644
--- a/src/main/java/org/codelibs/fess/helper/SearchHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/SearchHelper.java
@@ -76,8 +76,9 @@ public class SearchHelper {
     //                                                                      ==============
 
     public void search(final SearchRequestParams params, final SearchRenderData data, final OptionalThing<FessUserBean> userBean) {
-        final long requestedTime = ComponentUtil.getSystemHelper().getCurrentTimeAsLong();
-        final long startTime = System.currentTimeMillis();
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+        final long startTime = systemHelper.getCurrentTimeAsLong();
+        final long requestedTime = startTime;
 
         LaRequestUtil.getOptionalRequest().ifPresent(request -> {
             request.setAttribute(Constants.REQUEST_LANGUAGES, params.getLanguages());
@@ -112,7 +113,7 @@ public class SearchHelper {
             data.setAppendHighlightParams(buf.toString());
         }
 
-        queryResponseList.setExecTime(System.currentTimeMillis() - startTime);
+        queryResponseList.setExecTime(systemHelper.getCurrentTimeAsLong() - startTime);
         final NumberFormat nf = NumberFormat.getInstance(params.getLocale());
         nf.setMaximumIntegerDigits(2);
         nf.setMaximumFractionDigits(2);
diff --git a/src/main/java/org/codelibs/fess/helper/SuggestHelper.java b/src/main/java/org/codelibs/fess/helper/SuggestHelper.java
index a9de11a3f..091fa933c 100644
--- a/src/main/java/org/codelibs/fess/helper/SuggestHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/SuggestHelper.java
@@ -224,8 +224,8 @@ public class SuggestHelper {
             reader.setLimitOfDocumentSize(fessConfig.getSuggestUpdateContentsLimitDocSizeAsInteger());
 
             final List<FunctionScoreQueryBuilder.FilterFunctionBuilder> flist = new ArrayList<>();
-            flist.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(
-                    ScoreFunctionBuilders.randomFunction().seed(System.currentTimeMillis()).setField(fessConfig.getIndexFieldDocId())));
+            flist.add(new FunctionScoreQueryBuilder.FilterFunctionBuilder(ScoreFunctionBuilders.randomFunction()
+                    .seed(ComponentUtil.getSystemHelper().getCurrentTimeAsLong()).setField(fessConfig.getIndexFieldDocId())));
             reader.setQuery(QueryBuilders
                     .functionScoreQuery(QueryBuilders.matchAllQuery(),
                             flist.toArray(new FunctionScoreQueryBuilder.FilterFunctionBuilder[flist.size()]))
diff --git a/src/main/java/org/codelibs/fess/helper/SystemHelper.java b/src/main/java/org/codelibs/fess/helper/SystemHelper.java
index d4d3dc86e..c6912e083 100644
--- a/src/main/java/org/codelibs/fess/helper/SystemHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/SystemHelper.java
@@ -641,7 +641,7 @@ public class SystemHelper {
     }
 
     protected short getSystemCpuPercent() {
-        final long now = System.currentTimeMillis();
+        final long now = getCurrentTimeAsLong();
         if (now - systemCpuCheckTime > systemCpuCheckInterval) {
             synchronized (this) {
                 if (now - systemCpuCheckTime > systemCpuCheckInterval) {
diff --git a/src/main/java/org/codelibs/fess/helper/WebFsIndexHelper.java b/src/main/java/org/codelibs/fess/helper/WebFsIndexHelper.java
index df9375513..e1a6e2e5d 100644
--- a/src/main/java/org/codelibs/fess/helper/WebFsIndexHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/WebFsIndexHelper.java
@@ -94,7 +94,7 @@ public class WebFsIndexHelper {
         final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
 
-        final long startTime = System.currentTimeMillis();
+        final long startTime = systemHelper.getCurrentTimeAsLong();
 
         final List<String> sessionIdList = new ArrayList<>();
         crawlerList.clear();
@@ -443,7 +443,7 @@ public class WebFsIndexHelper {
         // put cralwing info
         final CrawlingInfoHelper crawlingInfoHelper = ComponentUtil.getCrawlingInfoHelper();
 
-        final long execTime = System.currentTimeMillis() - startTime;
+        final long execTime = systemHelper.getCurrentTimeAsLong() - startTime;
         crawlingInfoHelper.putToInfoMap(Constants.WEB_FS_CRAWLING_EXEC_TIME, Long.toString(execTime));
         if (logger.isInfoEnabled()) {
             logger.info("[EXEC TIME] crawling time: {}ms", execTime);
diff --git a/src/main/java/org/codelibs/fess/indexer/IndexUpdater.java b/src/main/java/org/codelibs/fess/indexer/IndexUpdater.java
index 88c9ebe0f..b20531f20 100644
--- a/src/main/java/org/codelibs/fess/indexer/IndexUpdater.java
+++ b/src/main/java/org/codelibs/fess/indexer/IndexUpdater.java
@@ -188,7 +188,7 @@ public class IndexUpdater extends Thread {
             final DocList docList = new DocList();
             final List<EsAccessResult> accessResultList = new ArrayList<>();
 
-            long updateTime = System.currentTimeMillis();
+            long updateTime = systemHelper.getCurrentTimeAsLong();
             int errorCount = 0;
             int emptyListCount = 0;
             long cleanupTime = -1;
@@ -200,7 +200,7 @@ public class IndexUpdater extends Thread {
                     docList.clear();
                     accessResultList.clear();
 
-                    updateTime = System.currentTimeMillis() - updateTime;
+                    updateTime = systemHelper.getCurrentTimeAsLong() - updateTime;
 
                     final long interval = updateInterval - updateTime;
                     if (interval > 0) {
@@ -217,7 +217,7 @@ public class IndexUpdater extends Thread {
                         logger.debug("Processing documents in IndexUpdater queue.");
                     }
 
-                    updateTime = System.currentTimeMillis();
+                    updateTime = systemHelper.getCurrentTimeAsLong();
 
                     List<EsAccessResult> arList = getAccessResultList(cb, cleanupTime);
                     if (arList.isEmpty()) {
@@ -246,7 +246,7 @@ public class IndexUpdater extends Thread {
                             cleanupFinishedSessionData();
                         }
                     }
-                    executeTime += System.currentTimeMillis() - updateTime;
+                    executeTime += systemHelper.getCurrentTimeAsLong() - updateTime;
 
                     if (logger.isDebugEnabled()) {
                         logger.debug("Processed documents in IndexUpdater queue.");
@@ -339,7 +339,7 @@ public class IndexUpdater extends Thread {
                 continue;
             }
 
-            final long startTime = System.currentTimeMillis();
+            final long startTime = systemHelper.getCurrentTimeAsLong();
             final AccessResultData<?> accessResultData = getAccessResultData(accessResult);
             if (accessResultData != null) {
                 accessResult.setAccessResultData(null);
@@ -371,7 +371,7 @@ public class IndexUpdater extends Thread {
                     docList.add(ingest(accessResult, map));
                     final long contentSize = indexingHelper.calculateDocumentSize(map);
                     docList.addContentSize(contentSize);
-                    final long processingTime = System.currentTimeMillis() - startTime;
+                    final long processingTime = systemHelper.getCurrentTimeAsLong() - startTime;
                     docList.addProcessingTime(processingTime);
                     if (logger.isDebugEnabled()) {
                         logger.debug("Added the document({}, {}ms). The number of a document cache is {} (size: {}).",
@@ -485,11 +485,11 @@ public class IndexUpdater extends Thread {
 
     private long cleanupAccessResults(final List<EsAccessResult> accessResultList) {
         if (!accessResultList.isEmpty()) {
-            final long execTime = System.currentTimeMillis();
+            final long execTime = systemHelper.getCurrentTimeAsLong();
             final int size = accessResultList.size();
             dataService.update(accessResultList);
             accessResultList.clear();
-            final long time = System.currentTimeMillis() - execTime;
+            final long time = systemHelper.getCurrentTimeAsLong() - execTime;
             if (logger.isDebugEnabled()) {
                 logger.debug("Updated {} access results. The execution time is {}ms.", size, time);
             }
@@ -502,7 +502,7 @@ public class IndexUpdater extends Thread {
         if (logger.isDebugEnabled()) {
             logger.debug("Getting documents in IndexUpdater queue.");
         }
-        final long execTime = System.currentTimeMillis();
+        final long execTime = systemHelper.getCurrentTimeAsLong();
         final List<EsAccessResult> arList = ((EsDataService) dataService).getAccessResultList(cb);
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
         if (!arList.isEmpty()) {
@@ -522,7 +522,7 @@ public class IndexUpdater extends Thread {
             } else {
                 buf.append("no docs in indexing queue (Doc:{access ");
             }
-            buf.append(System.currentTimeMillis() - execTime).append("ms");
+            buf.append(systemHelper.getCurrentTimeAsLong() - execTime).append("ms");
             if (cleanupTime >= 0) {
                 buf.append(", cleanup ").append(cleanupTime).append("ms");
             }
@@ -543,22 +543,23 @@ public class IndexUpdater extends Thread {
     }
 
     private void cleanupFinishedSessionData() {
-        final long execTime = System.currentTimeMillis();
+        final long execTime = systemHelper.getCurrentTimeAsLong();
         // cleanup
         for (final String sessionId : finishedSessionIdList) {
-            final long execTime2 = System.currentTimeMillis();
+            final long execTime2 = systemHelper.getCurrentTimeAsLong();
             if (logger.isDebugEnabled()) {
                 logger.debug("Deleting document data: {}", sessionId);
             }
             deleteBySessionId(sessionId);
             if (logger.isDebugEnabled()) {
-                logger.debug("Deleted {} documents. The execution time is {}ms.", sessionId, (System.currentTimeMillis() - execTime2));
+                logger.debug("Deleted {} documents. The execution time is {}ms.", sessionId,
+                        (systemHelper.getCurrentTimeAsLong() - execTime2));
             }
         }
         finishedSessionIdList.clear();
 
         if (logger.isInfoEnabled()) {
-            logger.info("Deleted completed document data. The execution time is {}ms.", (System.currentTimeMillis() - execTime));
+            logger.info("Deleted completed document data. The execution time is {}ms.", (systemHelper.getCurrentTimeAsLong() - execTime));
         }
     }
 
diff --git a/src/main/java/org/codelibs/fess/ldap/LdapManager.java b/src/main/java/org/codelibs/fess/ldap/LdapManager.java
index e719991e0..37e00d7c9 100644
--- a/src/main/java/org/codelibs/fess/ldap/LdapManager.java
+++ b/src/main/java/org/codelibs/fess/ldap/LdapManager.java
@@ -1086,10 +1086,11 @@ public class LdapManager {
                 controls.setReturningAttributes(returningAttrs);
             }
 
-            final long startTime = System.currentTimeMillis();
+            final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+            final long startTime = systemHelper.getCurrentTimeAsLong();
             final List<SearchResult> list = Collections.list(holder.get().search(baseDn, filter, controls));
             if (logger.isDebugEnabled()) {
-                logger.debug("LDAP search[{}ms]: {} - {}", System.currentTimeMillis() - startTime, baseDn, filter);
+                logger.debug("LDAP search[{}ms]: {} - {}", systemHelper.getCurrentTimeAsLong() - startTime, baseDn, filter);
             }
             consumer.accept(list);
         } catch (final NamingException e) {
diff --git a/src/main/java/org/codelibs/fess/sso/aad/AzureAdAuthenticator.java b/src/main/java/org/codelibs/fess/sso/aad/AzureAdAuthenticator.java
index 536cc4a15..3dc015ac6 100644
--- a/src/main/java/org/codelibs/fess/sso/aad/AzureAdAuthenticator.java
+++ b/src/main/java/org/codelibs/fess/sso/aad/AzureAdAuthenticator.java
@@ -168,7 +168,7 @@ public class AzureAdAuthenticator implements SsoAuthenticator {
             stateMap = new HashMap<>();
             session.setAttribute(STATES, stateMap);
         }
-        final StateData stateData = new StateData(nonce, System.currentTimeMillis());
+        final StateData stateData = new StateData(nonce, ComponentUtil.getSystemHelper().getCurrentTimeAsLong());
         if (logger.isDebugEnabled()) {
             logger.debug("store {} in session", stateData);
         }
@@ -319,7 +319,7 @@ public class AzureAdAuthenticator implements SsoAuthenticator {
         @SuppressWarnings("unchecked")
         final Map<String, StateData> states = (Map<String, StateData>) session.getAttribute(STATES);
         if (states != null) {
-            final long now = System.currentTimeMillis();
+            final long now = ComponentUtil.getSystemHelper().getCurrentTimeAsLong();
             states.entrySet().stream().filter(e -> (now - e.getValue().getExpiration()) / 1000L > getStateTtl()).map(Map.Entry::getKey)
                     .collect(Collectors.toList()).forEach(s -> {
                         if (logger.isDebugEnabled()) {
diff --git a/src/main/java/org/codelibs/fess/thumbnail/ThumbnailManager.java b/src/main/java/org/codelibs/fess/thumbnail/ThumbnailManager.java
index c2317f773..5309dc230 100644
--- a/src/main/java/org/codelibs/fess/thumbnail/ThumbnailManager.java
+++ b/src/main/java/org/codelibs/fess/thumbnail/ThumbnailManager.java
@@ -236,7 +236,8 @@ public class ThumbnailManager {
     }
 
     protected void process(final FessConfig fessConfig, final ThumbnailQueue entity) {
-        ComponentUtil.getSystemHelper().calibrateCpuLoad();
+        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
+        systemHelper.calibrateCpuLoad();
 
         if (logger.isDebugEnabled()) {
             logger.debug("Processing thumbnail: {}", entity);
@@ -245,14 +246,14 @@ public class ThumbnailManager {
         try {
             final File outputFile = new File(baseDir, entity.getPath());
             final File noImageFile = new File(outputFile.getAbsolutePath() + NOIMAGE_FILE_SUFFIX);
-            if (!noImageFile.isFile() || System.currentTimeMillis() - noImageFile.lastModified() > noImageExpired) {
+            if (!noImageFile.isFile() || systemHelper.getCurrentTimeAsLong() - noImageFile.lastModified() > noImageExpired) {
                 if (noImageFile.isFile() && !noImageFile.delete()) {
                     logger.warn("Failed to delete {}", noImageFile.getAbsolutePath());
                 }
                 final ThumbnailGenerator generator = ComponentUtil.getComponent(generatorName);
                 if (generator.isAvailable()) {
                     if (!generator.generate(entity.getThumbnailId(), outputFile)) {
-                        new File(outputFile.getAbsolutePath() + NOIMAGE_FILE_SUFFIX).setLastModified(System.currentTimeMillis());
+                        new File(outputFile.getAbsolutePath() + NOIMAGE_FILE_SUFFIX).setLastModified(systemHelper.getCurrentTimeAsLong());
                     } else {
                         final long interval = fessConfig.getThumbnailGeneratorIntervalAsInteger().longValue();
                         if (interval > 0) {
@@ -448,7 +449,7 @@ public class ThumbnailManager {
 
         @Override
         public FileVisitResult visitFile(final Path file, final BasicFileAttributes attrs) throws IOException {
-            if (System.currentTimeMillis() - Files.getLastModifiedTime(file).toMillis() > expiry) {
+            if (ComponentUtil.getSystemHelper().getCurrentTimeAsLong() - Files.getLastModifiedTime(file).toMillis() > expiry) {
                 deletedFileList.add(file);
                 if (deletedFileList.size() > maxPurgeSize) {
                     deleteFiles();
diff --git a/src/main/java/org/codelibs/fess/thumbnail/impl/CommandGenerator.java b/src/main/java/org/codelibs/fess/thumbnail/impl/CommandGenerator.java
index 355384dcd..eb7fb55ee 100644
--- a/src/main/java/org/codelibs/fess/thumbnail/impl/CommandGenerator.java
+++ b/src/main/java/org/codelibs/fess/thumbnail/impl/CommandGenerator.java
@@ -57,7 +57,7 @@ public class CommandGenerator extends BaseThumbnailGenerator {
         if (baseDir == null) {
             baseDir = new File(System.getProperty("java.io.tmpdir"));
         }
-        destoryTimer = new Timer("CommandGeneratorDestoryTimer-" + System.currentTimeMillis(), true);
+        destoryTimer = new Timer("CommandGeneratorDestoryTimer-" + ComponentUtil.getSystemHelper().getCurrentTimeAsLong(), true);
         updateProperties();
     }
 
diff --git a/src/main/java/org/codelibs/fess/util/GsaConfigParser.java b/src/main/java/org/codelibs/fess/util/GsaConfigParser.java
index 15e138934..8d0d0d246 100644
--- a/src/main/java/org/codelibs/fess/util/GsaConfigParser.java
+++ b/src/main/java/org/codelibs/fess/util/GsaConfigParser.java
@@ -126,7 +126,7 @@ public class GsaConfigParser extends DefaultHandler {
             throw new GsaConfigException("Invalid format.");
         }
         if (COLLECTION.equalsIgnoreCase(qName) && COLLECTIONS.equalsIgnoreCase(tagQueue.peekLast())) {
-            final long now = System.currentTimeMillis();
+            final long now = ComponentUtil.getSystemHelper().getCurrentTimeAsLong();
             final String name = attributes.getValue("Name");
             labelType = new LabelType();
             labelType.setName(name);
@@ -165,7 +165,7 @@ public class GsaConfigParser extends DefaultHandler {
         } else if (GLOBALPARAMS.equalsIgnoreCase(qName)) {
             final Object startUrls = globalParams.get(START_URLS);
             if (startUrls != null) {
-                final long now = System.currentTimeMillis();
+                final long now = ComponentUtil.getSystemHelper().getCurrentTimeAsLong();
                 final List<String> urlList = split(startUrls.toString(), "\n")
                         .get(stream -> stream.map(String::trim).filter(StringUtil::isNotBlank).collect(Collectors.toList()));
 
diff --git a/src/test/java/org/codelibs/fess/helper/CrawlerStatsHelperTest.java b/src/test/java/org/codelibs/fess/helper/CrawlerStatsHelperTest.java
index 64116b34b..1bbdcf83d 100644
--- a/src/test/java/org/codelibs/fess/helper/CrawlerStatsHelperTest.java
+++ b/src/test/java/org/codelibs/fess/helper/CrawlerStatsHelperTest.java
@@ -19,6 +19,7 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.codelibs.fess.helper.CrawlerStatsHelper.StatsKeyObject;
 import org.codelibs.fess.unit.UnitFessTestCase;
+import org.codelibs.fess.util.ComponentUtil;
 
 public class CrawlerStatsHelperTest extends UnitFessTestCase {
 
@@ -31,6 +32,7 @@ public class CrawlerStatsHelperTest extends UnitFessTestCase {
     @Override
     public void setUp() throws Exception {
         super.setUp();
+        ComponentUtil.register(new SystemHelper(), "systemHelper");
         crawlerStatsHelper = new CrawlerStatsHelper() {
             @Override
             protected void log(final StringBuilder buf) {
diff --git a/src/test/java/org/codelibs/fess/helper/IndexingHelperTest.java b/src/test/java/org/codelibs/fess/helper/IndexingHelperTest.java
index 4d064ef65..88fb28b55 100644
--- a/src/test/java/org/codelibs/fess/helper/IndexingHelperTest.java
+++ b/src/test/java/org/codelibs/fess/helper/IndexingHelperTest.java
@@ -50,6 +50,7 @@ public class IndexingHelperTest extends UnitFessTestCase {
     @Override
     public void setUp() throws Exception {
         super.setUp();
+        ComponentUtil.register(new SystemHelper(), "systemHelper");
         indexingHelper = new IndexingHelper() {
             @Override
             protected long getDocumentSizeByQuery(final SearchEngineClient searchEngineClient, final QueryBuilder queryBuilder,
diff --git a/src/test/java/org/codelibs/fess/util/GsaConfigParserTest.java b/src/test/java/org/codelibs/fess/util/GsaConfigParserTest.java
index 78e5d5e2b..2711fbc95 100644
--- a/src/test/java/org/codelibs/fess/util/GsaConfigParserTest.java
+++ b/src/test/java/org/codelibs/fess/util/GsaConfigParserTest.java
@@ -20,11 +20,18 @@ import java.io.InputStream;
 
 import org.codelibs.core.io.ResourceUtil;
 import org.codelibs.fess.es.config.exentity.LabelType;
+import org.codelibs.fess.helper.SystemHelper;
 import org.codelibs.fess.unit.UnitFessTestCase;
 import org.xml.sax.InputSource;
 
 public class GsaConfigParserTest extends UnitFessTestCase {
 
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        ComponentUtil.register(new SystemHelper(), "systemHelper");
+    }
+
     public void test_parse() throws IOException {
         GsaConfigParser parser = new GsaConfigParser();
         try (InputStream is = ResourceUtil.getResourceAsStream("data/gsaconfig.xml")) {