diff --git a/src/test/java/com/mattrixwv/matrix/TestIntegerMatrix.java b/src/test/java/com/mattrixwv/matrix/TestIntegerMatrix.java
index 34db4ea..7ce8f76 100644
--- a/src/test/java/com/mattrixwv/matrix/TestIntegerMatrix.java
+++ b/src/test/java/com/mattrixwv/matrix/TestIntegerMatrix.java
@@ -1059,4 +1059,58 @@ public class TestIntegerMatrix{
 		});
 		assertEquals("IntegerMatrix 10x10 failed transpose", correctMatrix, matrix.transpose());
 	}
+
+	@Test
+	public void testDeterminant(){
+		//1x1
+		IntegerMatrix matrix = new IntegerMatrix(grid1);
+		assertEquals("IntegerMatrix 1x1 failed determinant", 1, matrix.determinant());
+
+		//2x2
+		matrix = new IntegerMatrix(grid2);
+		assertEquals("IntegerMatrix 2x2 failed determinant1", 0, matrix.determinant());
+		matrix = new IntegerMatrix(new int[][]{
+			{1, 4},
+			{4, 1}
+		});
+		assertEquals("IntegerMatrix 2x2 failed determinant2", -15, matrix.determinant());
+
+		//3x3
+		matrix = new IntegerMatrix(grid3);
+		assertEquals("IntegerMatrix 3x3 failed determinant1", 0, matrix.determinant());
+		matrix = new IntegerMatrix(new int[][]{
+			{1, 4, 2},
+			{2, 4, 1},
+			{4, 1, 2}
+		});
+		assertEquals("IntegerMatrix 3x3 failed determinant2", -21, matrix.determinant());
+
+		//4x4
+		matrix = new IntegerMatrix(grid4);
+		assertEquals("IntegerMatrix 4x4 failed determiant1", 0, matrix.determinant());
+		matrix = new IntegerMatrix(new int[][]{
+			{1, 2, 3, 4},
+			{2, 3, 4, 1},
+			{3, 4, 1, 2},
+			{4, 1, 2, 3}
+		});
+		assertEquals("IntegerMatrix 4x4 failed determinant2", 160, matrix.determinant());
+
+		//10x10
+		matrix = new IntegerMatrix(grid10);
+		assertEquals("IntegerMatrix 10x10 failed determinant1", 0, matrix.determinant());
+		matrix = new IntegerMatrix(new int[][]{
+			{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
+			{2, 3, 4, 5, 6, 7, 8, 9, 10, 1},
+			{3, 4, 5, 6, 7, 8, 9, 10, 1, 2},
+			{4, 5, 6, 7, 8, 9, 10, 1, 2, 3},
+			{5, 6, 7, 8, 9, 10, 1, 2, 3, 4},
+			{6, 7, 8, 9, 10, 1, 2, 3, 4, 5},
+			{7, 8, 9, 10, 1, 2, 3, 4, 5, 6},
+			{8, 9, 10, 1, 2, 3, 4, 5, 6, 7},
+			{9, 10, 1, 2, 3, 4, 5, 6, 7, 8},
+			{0,  0, 0, 0, 0, 0, 0, 0, 0, 1}
+		});
+		assertEquals("IntegerMatrix 10x10 failed determinant2", -10000000, matrix.determinant());
+	}
 }