diff --git a/Marlin/tests/core/test_macros.cpp b/Marlin/tests/core/test_macros.cpp
index 75a1e88f71..38d9ae2732 100644
--- a/Marlin/tests/core/test_macros.cpp
+++ b/Marlin/tests/core/test_macros.cpp
@@ -21,7 +21,7 @@
  */
 
 #include "../test/unit_tests.h"
-#include <src/core/macros.h>
+#include "src/core/macros.h"
 
 // These represent enabled and disabled configuration options for testing.
 // They will be used by multiple tests.
diff --git a/Marlin/tests/feature/test_runout.cpp b/Marlin/tests/feature/test_runout.cpp
index 296e70916d..f3f2183085 100644
--- a/Marlin/tests/feature/test_runout.cpp
+++ b/Marlin/tests/feature/test_runout.cpp
@@ -24,7 +24,7 @@
 
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
 
-#include <src/feature/runout.h>
+#include "src/feature/runout.h"
 
 MARLIN_TEST(runout, poll_runout_states) {
   FilamentSensorBase sensor;
diff --git a/Marlin/tests/gcode/test_gcode.cpp b/Marlin/tests/gcode/test_gcode.cpp
index be364cb905..a64bb2b51f 100644
--- a/Marlin/tests/gcode/test_gcode.cpp
+++ b/Marlin/tests/gcode/test_gcode.cpp
@@ -21,8 +21,8 @@
  */
 
 #include "../test/unit_tests.h"
-#include <src/gcode/gcode.h>
-#include <src/gcode/parser.h>
+#include "src/gcode/gcode.h"
+#include "src/gcode/parser.h"
 
 MARLIN_TEST(gcode, process_parsed_command) {
   GcodeSuite suite;
diff --git a/test/unit_tests.cpp b/test/unit_tests.cpp
index 174ad2ef7f..c7aed1fe8c 100644
--- a/test/unit_tests.cpp
+++ b/test/unit_tests.cpp
@@ -21,6 +21,8 @@
  */
 
 /**
+ * unit_tests.cpp - Unit for running tests in the Marlin/tests/ folder.
+ *
  * Provide the main() function used for all compiled unit test binaries.
  * It collects all the tests defined in the code and runs them through Unity.
  */
diff --git a/test/unit_tests.h b/test/unit_tests.h
index f60c6c1da6..dd63406c9a 100644
--- a/test/unit_tests.h
+++ b/test/unit_tests.h
@@ -21,6 +21,10 @@
  */
 #pragma once
 
+/**
+ * unit_tests.h - Unit Tests class used by cpp files in the Marlin/tests/ folder.
+ */
+
 #include <list>
 #include <string>
 #include <unity.h>