diff --git a/src/test/c/test_sudoku.c b/src/test/c/test_sudoku.c
index c5abf7f..557f85d 100644
--- a/src/test/c/test_sudoku.c
+++ b/src/test/c/test_sudoku.c
@@ -260,6 +260,27 @@ void test_giving_hints_to_player(){
 }
 
 
+// 10
+
+void test_write_userinput_into_Sudoku_9_into_empty(){
+    test_help = true;
+    test_row_e = 1;
+    test_col_e = 1;
+    test_num = 9;
+    int Sudoku_grid[SIZE_OF_GAMEBORD_AXIS_X][SIZE_OF_GAMEBORD_AXIS_Y];
+    
+
+    write_userinput_into_Sudoku(Sudoku_grid);
+
+    TEST_ASSERT_EQUAL_INT_MESSAGE(test_num, Sudoku_grid[test_row_e -1][test_col_e -1], "Checking if number input is correct");
+            
+
+
+    printf("Unit test for write_userinput_into_Sudoku() executed.\n\n");
+}
+
+
+
 
 
 #endif // TEST