diff --git a/unittests/test_15.c b/unittests/test_15.c
new file mode 100644
index 0000000..d2587ff
--- /dev/null
+++ b/unittests/test_15.c
@@ -0,0 +1,8 @@
+#include "tests.h"
+
+void test_15()
+{
+    printf("TEST 15 STARTET\n");
+    assert(!compareStrings("HALLO", "HALLO"));
+    printf("TEST 15 ERFOLGREICH\n");
+}
\ No newline at end of file
diff --git a/unittests/test_main.c b/unittests/test_main.c
index a94b218..d27a0e7 100644
--- a/unittests/test_main.c
+++ b/unittests/test_main.c
@@ -18,4 +18,5 @@ int main()
     test_12();
     test_13();
     test_14();
+    test_15();
 }
\ No newline at end of file
diff --git a/unittests/tests.h b/unittests/tests.h
index 4043023..c26a285 100644
--- a/unittests/tests.h
+++ b/unittests/tests.h
@@ -18,4 +18,5 @@ void test_10();
 void test_11();
 void test_12();
 void test_13();
-void test_14();
\ No newline at end of file
+void test_14();
+void test_15();
\ No newline at end of file