diff --git a/src/test/test_duellist_spielesammlung_projekt.c b/src/test/test_duellist_spielesammlung_projekt.c
index c74dc9e..b990cfe 100644
--- a/src/test/test_duellist_spielesammlung_projekt.c
+++ b/src/test/test_duellist_spielesammlung_projekt.c
@@ -73,7 +73,20 @@ void test_diagonal_win(void) {
     TEST_ASSERT_EQUAL(GAME_WIN, result);
 }
 
+void test_valid_move_and_switch_player(void) {
+    // Arrange
+    TicTacToeGame game = { .board = {{EMPTY, EMPTY, EMPTY},
+                                     {EMPTY, EMPTY, EMPTY},
+                                     {EMPTY, EMPTY, EMPTY}},
+                          .currentPlayer = PLAYER_X };
 
+    // Act
+    GameResult moveResult = makeMove(&game, 1, 1);
+
+    // Assert
+    TEST_ASSERT_EQUAL(SUCCESS, moveResult);
+    TEST_ASSERT_EQUAL(PLAYER_O, game.currentPlayer);
+}