diff --git a/unittests/test_12.c b/unittests/test_12.c
new file mode 100644
index 0000000..afd189f
--- /dev/null
+++ b/unittests/test_12.c
@@ -0,0 +1,8 @@
+#include "tests.h"
+
+void test_12()
+{
+    printf("TEST 12 STARTET\n");
+    assert(!printEndMsg(100, 200));
+    printf("TEST 12 ERFOLGREICH\n");
+}
\ No newline at end of file
diff --git a/unittests/test_main.c b/unittests/test_main.c
index e81dd03..8e262bb 100644
--- a/unittests/test_main.c
+++ b/unittests/test_main.c
@@ -15,4 +15,5 @@ int main()
     test_9();
     test_10();
     test_11();
+    test_12();
 }
\ No newline at end of file
diff --git a/unittests/tests.h b/unittests/tests.h
index 99bce0f..9210433 100644
--- a/unittests/tests.h
+++ b/unittests/tests.h
@@ -15,4 +15,5 @@ void test_7();
 void test_8();
 void test_9();
 void test_10();
-void test_11();
\ No newline at end of file
+void test_11();
+void test_12();
\ No newline at end of file