diff --git a/AK/Assertions.h b/AK/Assertions.h
index 02dd366bd83..976e36e60cc 100644
--- a/AK/Assertions.h
+++ b/AK/Assertions.h
@@ -36,6 +36,7 @@
 #            define ASSERT assert
 #            define ASSERT_NOT_REACHED() assert(false)
 #            define RELEASE_ASSERT assert
+#            define TODO ASSERT_NOT_REACHED
 #        endif
 #    endif
 
diff --git a/AK/TestSuite.h b/AK/TestSuite.h
index ec68f780de8..b792edc1a49 100644
--- a/AK/TestSuite.h
+++ b/AK/TestSuite.h
@@ -37,6 +37,7 @@
 
 #define ASSERT_NOT_REACHED() fprintf(stderr, "\033[31;1mASSERT_NOT_REACHED\033[0m\n");
 #define RELEASE_ASSERT ASSERT
+#define TODO ASSERT_NOT_REACHED
 
 #include <AK/Function.h>
 #include <AK/NonnullRefPtrVector.h>
diff --git a/Kernel/Assertions.h b/Kernel/Assertions.h
index cd8244452b4..b48273a3012 100644
--- a/Kernel/Assertions.h
+++ b/Kernel/Assertions.h
@@ -47,3 +47,4 @@
     } while (0)
 #define ASSERT_INTERRUPTS_DISABLED() ASSERT(!(cpu_flags() & 0x200))
 #define ASSERT_INTERRUPTS_ENABLED() ASSERT(cpu_flags() & 0x200)
+#define TODO ASSERT_NOT_REACHED
diff --git a/Libraries/LibC/assert.h b/Libraries/LibC/assert.h
index 18711ac0e85..6045f9d484d 100644
--- a/Libraries/LibC/assert.h
+++ b/Libraries/LibC/assert.h
@@ -51,5 +51,6 @@ __attribute__((noreturn)) void __assertion_failed(const char* msg);
     } while (0)
 #define ASSERT assert
 #define RELEASE_ASSERT assert
+#define TODO ASSERT_NOT_REACHED
 
 __END_DECLS
diff --git a/Libraries/LibWeb/Parser/HTMLDocumentParser.cpp b/Libraries/LibWeb/Parser/HTMLDocumentParser.cpp
index 599d62bb8a0..6e917766d73 100644
--- a/Libraries/LibWeb/Parser/HTMLDocumentParser.cpp
+++ b/Libraries/LibWeb/Parser/HTMLDocumentParser.cpp
@@ -39,11 +39,6 @@
 #include <LibWeb/Parser/HTMLDocumentParser.h>
 #include <LibWeb/Parser/HTMLToken.h>
 
-#define TODO()                \
-    do {                      \
-        ASSERT_NOT_REACHED(); \
-    } while (0)
-
 #define PARSE_ERROR()                                                         \
     do {                                                                      \
         dbg() << "Parse error! " << __PRETTY_FUNCTION__ << " @ " << __LINE__; \
diff --git a/Libraries/LibWeb/Parser/HTMLTokenizer.cpp b/Libraries/LibWeb/Parser/HTMLTokenizer.cpp
index 59db11dcfe4..02dc1442735 100644
--- a/Libraries/LibWeb/Parser/HTMLTokenizer.cpp
+++ b/Libraries/LibWeb/Parser/HTMLTokenizer.cpp
@@ -37,12 +37,6 @@
 #define CONSUME_NEXT_INPUT_CHARACTER \
     current_input_character = next_codepoint();
 
-#define TODO()                                                                                              \
-    do {                                                                                                    \
-        dbg() << "[TODO: " << state_name(m_state) << "] '" << (char)current_input_character.value() << "'"; \
-        ASSERT_NOT_REACHED();                                                                               \
-    } while (0)
-
 #define SWITCH_TO(new_state)              \
     do {                                  \
         will_switch_to(State::new_state); \