diff --git a/Userland/Tests/Kernel/setpgid-across-sessions-without-leader.cpp b/Userland/Tests/Kernel/setpgid-across-sessions-without-leader.cpp
index 695acec1b74..48471e6db6c 100644
--- a/Userland/Tests/Kernel/setpgid-across-sessions-without-leader.cpp
+++ b/Userland/Tests/Kernel/setpgid-across-sessions-without-leader.cpp
@@ -79,14 +79,14 @@ static void fork_into(void (*fn)(void*), void* arg)
         const int disown_rc = disown(rc);
         if (disown_rc < 0) {
             perror("disown");
-            dbg() << "This might cause PA1 to remain in the Zombie state, "
-                     "and thus in the process list, meaning the leader is "
-                     "still 'alive' for the purpose of lookup.";
+            dbgln("This might cause PA1 to remain in the Zombie state, "
+                  "and thus in the process list, meaning the leader is "
+                  "still 'alive' for the purpose of lookup.");
         }
         return;
     }
     fn(arg);
-    dbg() << "child finished (?)";
+    dbgln("child finished (?)");
     exit(1);
 }
 
@@ -116,19 +116,19 @@ int main(int, char**)
         perror("pipe");
         exit(1);
     }
-    dbg() << "PX starts with SID=" << getsid(0) << ", PGID=" << getpgid(0) << ", PID=" << getpid() << ".";
-    dbg() << "PX forks into PA1";
+    dbgln("PX starts with SID={}, PGID={}, PID={}.", getsid(0), getpgid(0), getpid());
+    dbgln("PX forks into PA1");
     fork_into(run_pa1, nullptr);
     sleep_steps(4);
 
     // Time 4: PX forks into PB1
-    dbg() << "PX forks into PB1";
+    dbgln("PX forks into PB1");
     fork_into(run_pb1, &(fds[1]));
     sleep_steps(5);
 
     // Time 9: If PX hasn't received any message yet through the pipe, it declares
     // the test as failed (for lack of knowledge). Otherwise, it outputs accordingly.
-    dbg() << "PX reads from pipe";
+    dbgln("PX reads from pipe");
     unsigned char buf = 42;
     ssize_t rc = read(fds[0], &buf, 1);
     if (rc == 0) {
@@ -166,36 +166,36 @@ static void run_pa1(void*)
     sleep_steps(1);
 
     // Time 1: PA1 creates a new session (SA) and pgrp (PGA)
-    dbg() << "PA1 starts with SID=" << getsid(0) << ", PGID=" << getpgid(0) << ", PID=" << getpid() << ".";
-    dbg() << "PA1 calls setsid()";
+    dbgln("PA1 starts with SID={}, PGID={}, PID={}.", getsid(0), getpgid(0), getpid());
+    dbgln("PA1 calls setsid()");
     int rc = setsid();
     if (rc < 0) {
         perror("setsid (PA)");
         ASSERT_NOT_REACHED();
     }
-    dbg() << "PA1 did setsid() -> PGA=" << rc << ", SA=" << getsid(0) << ", yay!";
+    dbgln("PA1 did setsid() -> PGA={}, SA={}, yay!", rc, getsid(0));
     sleep_steps(1);
 
     // Time 2: PA1 forks into PA2
-    dbg() << "PA1 forks into PA2";
+    dbgln("PA1 forks into PA2");
     fork_into(run_pa2, nullptr);
     sleep_steps(1);
 
     // Time 3: PA1 dies (PGA now has no leader)
-    dbg() << "PA1 dies. You should see a 'Reaped unparented process' "
-             "message with my ID next, OR THIS TEST IS MEANINGLESS "
-             "(see fork_into()).";
+    dbgln("PA1 dies. You should see a 'Reaped unparented process' "
+          "message with my ID next, OR THIS TEST IS MEANINGLESS "
+          "(see fork_into()).");
     exit(0);
 }
 
 static void run_pa2(void*)
 {
     // Time 2: PA1 forks into PA2
-    dbg() << "PA2 starts with SID=" << getsid(0) << ", PGID=" << getpgid(0) << ", PID=" << getpid() << ".";
+    dbgln("PA2 starts with SID={}, PGID={}, PID={}.", getsid(0), getpgid(0), getpid());
     sleep_steps(18);
 
     // pa_2 never *does* anything.
-    dbg() << "PA2 dies from boredom.";
+    dbgln("PA2 dies from boredom.");
     exit(1);
 }
 
@@ -205,25 +205,25 @@ static void run_pb1(void* pipe_fd_ptr)
     sleep_steps(1);
 
     // Time 5: PB1 creates a new session (SB) and pgrp (PGB)
-    dbg() << "PB1 starts with SID=" << getsid(0) << ", PGID=" << getpgid(0) << ", PID=" << getpid() << ".";
-    dbg() << "PB1 calls setsid()";
+    dbgln("PB1 starts with SID={}, PGID={}, PID={}.", getsid(0), getpgid(0), getpid());
+    dbgln("PB1 calls setsid()");
     int rc = setsid();
     if (rc < 0) {
         perror("setsid (PB)");
         ASSERT_NOT_REACHED();
     }
-    dbg() << "PB1 did setsid() -> PGB=" << rc << ", SB=" << getsid(0) << ", yay!";
+    dbgln("PB1 did setsid() -> PGB={}, SB={}, yay!", rc, getsid(0));
     sleep_steps(1);
 
     // Time 6: PB1 forks into PB2
-    dbg() << "PB1 forks into PB2";
+    dbgln("PB1 forks into PB2");
     fork_into(run_pb2, pipe_fd_ptr);
     sleep_steps(1);
 
     // Time 7: PB1 dies (PGB now has no leader)
-    dbg() << "PB1 dies. You should see a 'Reaped unparented process' "
-             "message with my ID next, OR THIS TEST IS MEANINGLESS "
-             "(see fork_into()).";
+    dbgln("PB1 dies. You should see a 'Reaped unparented process' "
+          "message with my ID next, OR THIS TEST IS MEANINGLESS "
+          "(see fork_into()).");
     exit(0);
 }
 
@@ -232,9 +232,9 @@ static void simulate_sid_from_pgid(pid_t pgid)
     pid_t rc = getpgid(pgid); // Same confusion as in the Kernel
     int saved_errno = errno;
     if (rc < 0 && saved_errno == ESRCH) {
-        dbg() << "The old get_sid_from_pgid(" << pgid << ") would return -1";
+        dbgln("The old get_sid_from_pgid({}) would return -1", pgid);
     } else if (rc >= 0) {
-        dbg() << "FAIL: Process " << pgid << " still exists?! PGID is " << rc << ".";
+        dbgln("FAIL: Process {} still exists?! PGID is {}.", pgid, rc);
     } else {
         perror("pgid (probably fail)");
     }
@@ -247,49 +247,49 @@ static void run_pb2(void* pipe_fd_ptr)
 
     // Time 8: PB2 calls pgrp(0, PGA)
     //   Note: PB2 writes "1" (exploit successful) or "0" (bug is fixed) to a pipe
-    dbg() << "PB2 starts with SID=" << getsid(0) << ", PGID=" << getpgid(0) << ", PID=" << getpid() << ".";
-    dbg() << "PB2 calls pgrp(0, PGA)";
+    dbgln("PB2 starts with SID={}, PGID={}, PID={}.", getsid(0), getpgid(0), getpid());
+    dbgln("PB2 calls pgrp(0, PGA)");
     int pga = getpid() - 3;
-    dbg() << "PB2: Actually, what is PGA? I guess it's " << pga << "?";
+    dbgln("PB2: Actually, what is PGA? I guess it's {}?", pga);
     simulate_sid_from_pgid(pga);
     int rc = setpgid(0, pga);
     unsigned char to_write = 123;
     if (rc == 0) {
-        dbg() << "PB2: setgpid SUCCESSFUL! CHANGED PGROUP!";
+        dbgln("PB2: setgpid SUCCESSFUL! CHANGED PGROUP!");
         to_write = 1;
     } else {
         ASSERT(rc == -1);
         switch (errno) {
         case EACCES:
-            dbg() << "PB2: Failed with EACCES. Huh?!";
+            dbgln("PB2: Failed with EACCES. Huh?!");
             to_write = 101;
             break;
         case EINVAL:
-            dbg() << "PB2: Failed with EINVAL. Huh?!";
+            dbgln("PB2: Failed with EINVAL. Huh?!");
             to_write = 102;
             break;
         case ESRCH:
-            dbg() << "PB2: Failed with ESRCH. Huh?!";
+            dbgln("PB2: Failed with ESRCH. Huh?!");
             to_write = 103;
             break;
         case EPERM:
-            dbg() << "PB2: Failed with EPERM. Aww, no exploit today :^)";
+            dbgln("PB2: Failed with EPERM. Aww, no exploit today :^)");
             to_write = 0;
             break;
         default:
-            dbg() << "PB2: Failed with errno=" << errno << "?!";
+            dbgln("PB2: Failed with errno={}?!", errno);
             perror("setpgid");
             to_write = 104;
             break;
         }
     }
 
-    dbg() << "PB2 ends with SID=" << getsid(0) << ", PGID=" << getpgid(0) << ", PID=" << getpid() << ".";
+    dbgln("PB2 ends with SID={}, PGID={}, PID={}.", getsid(0), getpgid(0), getpid());
     int* pipe_fd = static_cast<int*>(pipe_fd_ptr);
     ASSERT(*pipe_fd);
     rc = write(*pipe_fd, &to_write, 1);
     if (rc != 1) {
-        dbg() << "Wrote only " << rc << " bytes instead of 1?!";
+        dbgln("Wrote only {} bytes instead of 1?!", rc);
         exit(1);
     }
     exit(0);
diff --git a/Userland/copy.cpp b/Userland/copy.cpp
index d80acd7033f..90d2e04430e 100644
--- a/Userland/copy.cpp
+++ b/Userland/copy.cpp
@@ -62,7 +62,7 @@ static Options parse_options(int argc, char* argv[])
             Core::File::ShouldCloseFileDescriptor::No);
         ASSERT(success);
         auto buffer = c_stdin->read_all();
-        dbg() << "Read size " << buffer.size();
+        dbgln("Read size {}", buffer.size());
         options.data = String((char*)buffer.data(), buffer.size());
     } else {
         // Copy the rest of our command-line args.
diff --git a/Userland/lsof.cpp b/Userland/lsof.cpp
index 26de05ea914..029565cedc9 100644
--- a/Userland/lsof.cpp
+++ b/Userland/lsof.cpp
@@ -66,13 +66,13 @@ static bool parse_name(StringView name, OpenFile& file)
             return true;
         } else {
             if (!lexer.consume_specific('(')) {
-                dbg() << "parse_name: expected (";
+                dbgln("parse_name: expected (");
                 return false;
             }
 
             auto component3 = lexer.consume_until(')');
             if (lexer.tell_remaining() != 0) {
-                dbg() << "parse_name: expected EOF";
+                dbgln("parse_name: expected EOF");
                 return false;
             }
 
diff --git a/Userland/man.cpp b/Userland/man.cpp
index 43e5cc40814..079660494c1 100644
--- a/Userland/man.cpp
+++ b/Userland/man.cpp
@@ -107,7 +107,7 @@ int main(int argc, char* argv[])
         return 1;
     }
 
-    dbg() << "Loading man page from " << file->filename();
+    dbgln("Loading man page from {}", file->filename());
     auto buffer = file->read_all();
     auto source = String::copy(buffer);
 
diff --git a/Userland/md.cpp b/Userland/md.cpp
index b23c98c206f..04e77d28cd2 100644
--- a/Userland/md.cpp
+++ b/Userland/md.cpp
@@ -84,7 +84,7 @@ int main(int argc, char* argv[])
     }
 
     auto buffer = file->read_all();
-    dbg() << "Read size " << buffer.size();
+    dbgln("Read size {}", buffer.size());
 
     auto input = String::copy(buffer);
     auto document = Markdown::Document::parse(input);
diff --git a/Userland/misbehaving-application.cpp b/Userland/misbehaving-application.cpp
index a676102bd1d..cee1ccab1cf 100644
--- a/Userland/misbehaving-application.cpp
+++ b/Userland/misbehaving-application.cpp
@@ -33,7 +33,7 @@ int main(int, char**)
     Core::EventLoop event_loop;
 
     auto timer = Core::Timer::construct(10, [&] {
-        dbg() << "Now hanging!";
+        dbgln("Now hanging!");
         while (true) {
             sleep(1);
         }
diff --git a/Userland/mount.cpp b/Userland/mount.cpp
index 6c98e496d59..a284dee66c3 100644
--- a/Userland/mount.cpp
+++ b/Userland/mount.cpp
@@ -85,7 +85,7 @@ static int get_source_fd(const char* source)
 static bool mount_all()
 {
     // Mount all filesystems listed in /etc/fstab.
-    dbg() << "Mounting all filesystems...";
+    dbgln("Mounting all filesystems...");
 
     auto fstab = Core::File::construct("/etc/fstab");
     if (!fstab->open(Core::IODevice::OpenMode::ReadOnly)) {
diff --git a/Userland/pro.cpp b/Userland/pro.cpp
index 3b350f142d2..970352331dc 100644
--- a/Userland/pro.cpp
+++ b/Userland/pro.cpp
@@ -244,7 +244,7 @@ int main(int argc, char** argv)
         download->on_headers_received = [&](auto& response_headers, auto status_code) {
             if (received_actual_headers)
                 return;
-            dbg() << "Received headers! response code = " << status_code.value_or(0);
+            dbgln("Received headers! response code = {}", status_code.value_or(0));
             received_actual_headers = true; // And not trailers!
             String output_name;
             if (auto content_disposition = response_headers.get("Content-Disposition"); content_disposition.has_value()) {
diff --git a/Userland/profile.cpp b/Userland/profile.cpp
index cff8a5b7b8a..915518beb0b 100644
--- a/Userland/profile.cpp
+++ b/Userland/profile.cpp
@@ -83,7 +83,7 @@ int main(int argc, char** argv)
 
     cmd_argv.append(nullptr);
 
-    dbg() << "Enabling profiling for PID " << getpid();
+    dbgln("Enabling profiling for PID {}", getpid());
     profiling_enable(getpid());
     if (execvp(cmd_argv[0], const_cast<char**>(cmd_argv.data())) < 0) {
         perror("execv");
diff --git a/Userland/test-js.cpp b/Userland/test-js.cpp
index 481a1a90ae0..9245d064926 100644
--- a/Userland/test-js.cpp
+++ b/Userland/test-js.cpp
@@ -193,7 +193,7 @@ static void cleanup_and_exit()
 
 static void handle_sigabrt(int)
 {
-    dbg() << "test-js: SIGABRT received, cleaning up.";
+    dbgln("test-js: SIGABRT received, cleaning up.");
     cleanup_and_exit();
 }
 
diff --git a/Userland/utmpupdate.cpp b/Userland/utmpupdate.cpp
index b7652c13aca..c055559b7e4 100644
--- a/Userland/utmpupdate.cpp
+++ b/Userland/utmpupdate.cpp
@@ -65,11 +65,11 @@ int main(int argc, char** argv)
         return 1;
     }
 
-    dbg() << "Updating utmp from UID=" << getuid() << " GID=" << getgid() << " EGID=" << getegid() << " PID=" << pid;
+    dbgln("Updating utmp from UID={} GID={} EGID={} PID={}", getuid(), getgid(), getegid(), pid);
 
     auto file_or_error = Core::File::open("/var/run/utmp", Core::IODevice::ReadWrite);
     if (file_or_error.is_error()) {
-        dbg() << "Error: " << file_or_error.error();
+        dbgln("Error: {}", file_or_error.error());
         return 1;
     }
 
@@ -81,7 +81,7 @@ int main(int argc, char** argv)
     JsonObject json;
 
     if (!previous_json.has_value() || !previous_json.value().is_object()) {
-        dbg() << "Error: Could not parse JSON";
+        dbgln("Error: Could not parse JSON");
     } else {
         json = previous_json.value().as_object();
     }
@@ -95,22 +95,22 @@ int main(int argc, char** argv)
         json.set(tty_name, move(entry));
     } else {
         ASSERT(flag_delete);
-        dbg() << "Removing " << tty_name << " from utmp";
+        dbgln("Removing {} from utmp", tty_name);
         json.remove(tty_name);
     }
 
     if (!file.seek(0)) {
-        dbg() << "Seek failed";
+        dbgln("Seek failed");
         return 1;
     }
 
     if (!file.truncate(0)) {
-        dbg() << "Truncation failed";
+        dbgln("Truncation failed");
         return 1;
     }
 
     if (!file.write(json.to_string())) {
-        dbg() << "Write failed";
+        dbgln("Write failed");
         return 1;
     }