diff --git a/app/src/test/java/sudoku/SolverTest.java b/app/src/test/java/sudoku/SolverTest.java
index 7089fc8..2877430 100644
--- a/app/src/test/java/sudoku/SolverTest.java
+++ b/app/src/test/java/sudoku/SolverTest.java
@@ -55,6 +55,9 @@ class SolverTest {
         solver.randomizeBoard();
         assertFalse(solver.isSolved());
         assertTrue(solver.solve());
+        solver.clear();
+        solver.randomizeBoard();
+        assertFalse(solver.isSolved());
     }
 
     @Test