diff --git a/P/Sd1/Filepath/src/test/java/de/hdm_stuttgart/mi/sd1/filepath/MetaInfoUnixTest.java b/P/Sd1/Filepath/src/test/java/de/hdm_stuttgart/mi/sd1/filepath/MetaInfoUnixTest.java
index 467c3aeb1e78a9b83022c7d254a4d975ad63d4f7..e29e365c26960bcdd8141b1d3ca86a5d85f4c71e 100644
--- a/P/Sd1/Filepath/src/test/java/de/hdm_stuttgart/mi/sd1/filepath/MetaInfoUnixTest.java
+++ b/P/Sd1/Filepath/src/test/java/de/hdm_stuttgart/mi/sd1/filepath/MetaInfoUnixTest.java
@@ -23,7 +23,7 @@ public class MetaInfoUnixTest {
        Assert.assertEquals(FileMetaInfo.NO_DRIVE, fmi.drive);
        Assert.assertEquals("/usr/openvpn", fmi.path);
        Assert.assertEquals("hdm", fmi.basename);
-       Assert.assertEquals(null, fmi.extension);
+       Assert.assertNull(fmi.extension);
    }
 
    @Test
@@ -49,7 +49,7 @@ public class MetaInfoUnixTest {
        Assert.assertEquals(FileMetaInfo.NO_DRIVE, fmi.drive);
        Assert.assertEquals("../Desktop", fmi.path);
        Assert.assertEquals("icon", fmi.basename);
-       Assert.assertEquals(null, fmi.extension);
+       Assert.assertNull(fmi.extension);
    }
 
     @Test
@@ -75,6 +75,6 @@ public class MetaInfoUnixTest {
         Assert.assertEquals(FileMetaInfo.NO_DRIVE, fmi.drive);
         Assert.assertEquals("", fmi.path);
         Assert.assertEquals("a", fmi.basename);
-        Assert.assertEquals(null, fmi.extension);
+        Assert.assertNull(fmi.extension);
     }
 }
diff --git a/P/Sd1/Filepath/src/test/java/de/hdm_stuttgart/mi/sd1/filepath/MetaInfoWindowsTest.java b/P/Sd1/Filepath/src/test/java/de/hdm_stuttgart/mi/sd1/filepath/MetaInfoWindowsTest.java
index e970a3baf151508b3f6a2f80c54b0d6a1e67236d..2ceaafb7d9fab296305ba65812a893a3e20e3013 100644
--- a/P/Sd1/Filepath/src/test/java/de/hdm_stuttgart/mi/sd1/filepath/MetaInfoWindowsTest.java
+++ b/P/Sd1/Filepath/src/test/java/de/hdm_stuttgart/mi/sd1/filepath/MetaInfoWindowsTest.java
@@ -23,7 +23,7 @@ public class MetaInfoWindowsTest {
        Assert.assertEquals('F', fmi.drive);
        Assert.assertEquals("\\software\\my", fmi.path);
        Assert.assertEquals("archive", fmi.basename);
-       Assert.assertEquals(null, fmi.extension);
+       Assert.assertNull(fmi.extension);
    }
 
    @Test
@@ -49,7 +49,7 @@ public class MetaInfoWindowsTest {
        Assert.assertEquals(FileMetaInfo.NO_DRIVE, fmi.drive);
        Assert.assertEquals("..\\Desktop", fmi.path);
        Assert.assertEquals("icon", fmi.basename);
-       Assert.assertEquals(null, fmi.extension);
+       Assert.assertNull(fmi.extension);
    }
 
    @Test
@@ -74,7 +74,7 @@ public class MetaInfoWindowsTest {
         Assert.assertEquals(FileMetaInfo.NO_DRIVE, fmi.drive);
         Assert.assertEquals("", fmi.path);
         Assert.assertEquals("a", fmi.basename);
-        Assert.assertEquals(null, fmi.extension);
+        Assert.assertNull(fmi.extension);
     }
 
 }