diff --git a/fixed_wide_vectors/src/tests/fixed_wide.rs b/fixed_wide_vectors/src/tests/fixed_wide.rs
index e382ffa..1f87fb0 100644
--- a/fixed_wide_vectors/src/tests/fixed_wide.rs
+++ b/fixed_wide_vectors/src/tests/fixed_wide.rs
@@ -61,3 +61,34 @@ fn wide_matrix_dot(){
 		])
 	);
 }
+
+#[test]
+fn wide_matrix_det(){
+	let m=Matrix3::from([
+		Vector3::from([Planar64::from(1),Planar64::from(2),Planar64::from(3)]),
+		Vector3::from([Planar64::from(4),Planar64::from(5),Planar64::from(7)]),
+		Vector3::from([Planar64::from(6),Planar64::from(8),Planar64::from(9)]),
+	]);
+	// In[2]:= Det[{{1, 2, 3}, {4, 5, 7}, {6, 8, 9}}]
+	// Out[2]= 7
+	assert_eq!(m.wide_det_3x3_1(),fixed_wide::fixed::Fixed::<3,96>::from(7));
+}
+
+#[test]
+fn wide_matrix_adjugate(){
+	let m=Matrix3::from([
+		Vector3::from([Planar64::from(1),Planar64::from(2),Planar64::from(3)]),
+		Vector3::from([Planar64::from(4),Planar64::from(5),Planar64::from(7)]),
+		Vector3::from([Planar64::from(6),Planar64::from(8),Planar64::from(9)]),
+	]);
+	// In[6]:= Adjugate[{{1, 2, 3}, {4, 5, 7}, {6, 8, 9}}]
+	// Out[6]= {{-11, 6, -1}, {6, -9, 5}, {2, 4, -3}}
+	assert_eq!(
+		m.wide_adjugate_3x3_1(),
+		Matrix3::from([
+			Vector3::from([Planar64Wide1::from(-11),Planar64Wide1::from(6),Planar64Wide1::from(-1)]),
+			Vector3::from([Planar64Wide1::from(6),Planar64Wide1::from(-9),Planar64Wide1::from(5)]),
+			Vector3::from([Planar64Wide1::from(2),Planar64Wide1::from(4),Planar64Wide1::from(-3)]),
+		])
+	);
+}