diff --git a/src/test/c/test_TicTacToe.c b/src/test/c/test_TicTacToe.c
index 53292e3..a6e0cf9 100644
--- a/src/test/c/test_TicTacToe.c
+++ b/src/test/c/test_TicTacToe.c
@@ -62,18 +62,18 @@ void test_TicTacToe_Winner_X_line_3(void)
 void test_TicTacToe_Winner_O_col_1(void)
 {
     /* arrange */
-    int expected = 2;
-    int actual;
-    char board[3][3] = {
-        {'O', 'X', 'X'},
-        {'O', 'O', '_'},
-        {'O', '_', '_'}
-    };
+        int expected = 2;
+        int actual;
+        char board[3][3] = {
+            {'O', 'X', 'X'},
+            {'O', 'O', '_'},
+            {'O', '_', '_'}
+        };
     /* act */
-    actual = Winner(board);
+        actual = Winner(board);
 
     /* assert */
-    TEST_ASSERT_EQUAL_INT(expected, actual);
+        TEST_ASSERT_EQUAL_INT(expected, actual);
 }
 void test_TicTacToe_Winner_X_col_2(void)
 {
@@ -154,4 +154,20 @@ void test_TicTacToe_mid_Round(void)
 
     /* assert */
     TEST_ASSERT_EQUAL_INT(expected, actual);
-}
\ No newline at end of file
+}
+void test_TicTacToe_Tie(void)
+{
+    /* arrange */
+    int expected = 0;
+    int actual;
+    char board[3][3] = {
+        {'X', 'X', 'O'},
+        {'O', 'O', 'X'},
+        {'X', 'X', 'O'}
+    };
+    /* act */
+    actual = Winner(board);
+
+    /* assert */
+    TEST_ASSERT_EQUAL_INT(expected, actual);
+}