diff --git a/test/test_tictactoe.c b/test/test_tictactoe.c
index 324cac9..fb2e499 100644
--- a/test/test_tictactoe.c
+++ b/test/test_tictactoe.c
@@ -46,4 +46,15 @@ void test_checkLine_horizontalerGewinner(void) {
     TEST_ASSERT_EQUAL_CHAR('X', result);
 }
 
+void test_isValidMove_gueltigerZug(void) {
+    /* arrangieren */
+    int result;
+    int choice = 5;
+
+    /* handeln */
+    result = isValidMove(choice);
+
+    /* überprüfen */
+    TEST_ASSERT_EQUAL_INT(1, result);
+}
 #endif // TEST