diff --git a/stackTests.c b/stackTests.c
new file mode 100644
index 0000000..55dcedd
--- /dev/null
+++ b/stackTests.c
@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "stack.h"
+#include "unity.h"
+
+//Initialisierung
+void setUp(void){}
+void tearDown(void){}
+
+void test_push_created_new_stacknode(void)
+{
+    StackNode test = {111,NULL};
+    int testdata = 222;
+    void *data =&testdata;
+
+    StackNode test1 = push(&test,data);
+    unsigned int n = 50;
+    unsigned int* arr = createNumbers(n);
+
+    TEST_ASSERT_NOT_NULL(arr);
+
+    // Ein paar Werte prüfen (dürfen alles sein, nur kein Segfault)
+    for (unsigned int i = 0; i < n; i++)
+        TEST_ASSERT_TRUE(arr[i] >= 0);
+
+    free(arr);
+}
+
+
+
+
+
+int main(void)
+{
+    UNITY_BEGIN();
+
+    RUN_TEST(test_createNumbers_returns_valid_array);
+    RUN_TEST(test_createNumbers_contains_exactly_one_duplicate);
+    RUN_TEST(test_getDuplicated_finds_correct_duplicate);
+
+    return UNITY_END();
+}
\ No newline at end of file