diff --git a/test/Minesweeper/test_is_Valid_tile.c b/test/Minesweeper/test_is_Valid_tile.c
index 058be3b..13e8980 100644
--- a/test/Minesweeper/test_is_Valid_tile.c
+++ b/test/Minesweeper/test_is_Valid_tile.c
@@ -11,7 +11,7 @@ void test_detect_not_valid_tile_left(void){
     /* arrange */
     Minesweeper_Board board = initialize_minesweeper();
     int tile = 0;
-    int direction = 1;
+    int direction = 2;
     int result;
 
     /* act */
@@ -35,10 +35,10 @@ void test_detect_not_valid_tile_up(void){
     TEST_ASSERT_EQUAL_INT(-1, result);//not valid tile
 }
 
-void test_detect_valid_tile_right(void){
+void test_detect_not_valid_tile_right(void){
     /* arrange */
     Minesweeper_Board board = initialize_minesweeper();
-    int tile = 0;
+    int tile = board.width * board.height - 1;
     int direction = 5;
     int result;
 
@@ -46,13 +46,13 @@ void test_detect_valid_tile_right(void){
     result = is_Valid_tile(&board, tile, direction);
 
     /* assert */
-    TEST_ASSERT_EQUAL_INT(1, result);//not valid tile
+    TEST_ASSERT_EQUAL_INT(-1, result);//not valid tile
 }
 
-void test_detect_valid_tile_down(void){
+void test_detect_not_valid_tile_down(void){
     /* arrange */
     Minesweeper_Board board = initialize_minesweeper();
-    int tile = 0;
+    int tile = board.width * board.height - 1;
     int direction = 4;
     int result;
 
@@ -60,27 +60,55 @@ void test_detect_valid_tile_down(void){
     result = is_Valid_tile(&board, tile, direction);
 
     /* assert */
-    TEST_ASSERT_EQUAL_INT(0 + board.width, result);//not valid tile
+    TEST_ASSERT_EQUAL_INT(-1, result);//not valid tile
 }
 
-void test_detect_not_valid_tile_right(void){
+void test_detect_valid_tile_left(void){
     /* arrange */
     Minesweeper_Board board = initialize_minesweeper();
     int tile = board.width * board.height - 1;
-    int direction = 5;
+    int direction = 2;
     int result;
 
     /* act */
     result = is_Valid_tile(&board, tile, direction);
 
     /* assert */
-    TEST_ASSERT_EQUAL_INT(-1, result);//not valid tile
+    TEST_ASSERT_EQUAL_INT(board.width * board.height - 2, result);//not valid tile
 }
 
-void test_detect_not_valid_tile_down(void){
+void test_detect_valid_tile_up(void){
     /* arrange */
     Minesweeper_Board board = initialize_minesweeper();
     int tile = board.width * board.height - 1;
+    int direction = 3;
+    int result;
+
+    /* act */
+    result = is_Valid_tile(&board, tile, direction);
+
+    /* assert */
+    TEST_ASSERT_EQUAL_INT(board.width * (board.height - 1) - 1, result);//not valid tile
+}
+
+void test_detect_valid_tile_right(void){
+    /* arrange */
+    Minesweeper_Board board = initialize_minesweeper();
+    int tile = 0;
+    int direction = 5;
+    int result;
+
+    /* act */
+    result = is_Valid_tile(&board, tile, direction);
+
+    /* assert */
+    TEST_ASSERT_EQUAL_INT(1, result);//not valid tile
+}
+
+void test_detect_valid_tile_down(void){
+    /* arrange */
+    Minesweeper_Board board = initialize_minesweeper();
+    int tile = 0;
     int direction = 4;
     int result;
 
@@ -88,7 +116,7 @@ void test_detect_not_valid_tile_down(void){
     result = is_Valid_tile(&board, tile, direction);
 
     /* assert */
-    TEST_ASSERT_EQUAL_INT(-1, result);//not valid tile
+    TEST_ASSERT_EQUAL_INT(0 + board.width, result);//not valid tile
 }
 
 #endif // TEST
\ No newline at end of file