diff --git a/unittests/test_9.c b/unittests/test_9.c
new file mode 100644
index 0000000..078f9bc
--- /dev/null
+++ b/unittests/test_9.c
@@ -0,0 +1,8 @@
+#include "tests.h"
+
+void test_9()
+{
+    printf("TEST 9 STARTET\n");
+    assert(!compareStrings("Hund", "Hund"));
+    printf("TEST 9 ERFOLGREICH\n");
+}
\ No newline at end of file
diff --git a/unittests/test_main.c b/unittests/test_main.c
index a7b37df..9659a60 100644
--- a/unittests/test_main.c
+++ b/unittests/test_main.c
@@ -12,4 +12,5 @@ int main()
     test_6();
     test_7();
     test_8();
+    test_9();
 }
\ No newline at end of file
diff --git a/unittests/tests.h b/unittests/tests.h
index f2ef0d1..dcd65a9 100644
--- a/unittests/tests.h
+++ b/unittests/tests.h
@@ -12,4 +12,5 @@ void test_4();
 void test_5();
 void test_6();
 void test_7();
-void test_8();
\ No newline at end of file
+void test_8();
+void test_9();
\ No newline at end of file