diff --git a/fixed_wide/src/tests.rs b/fixed_wide/src/tests.rs
index 8e4dd4e..22002a2 100644
--- a/fixed_wide/src/tests.rs
+++ b/fixed_wide/src/tests.rs
@@ -139,3 +139,27 @@ fn test_sqrt_max(){
 	let a=I32F32::MAX;
 	test_exact(a);
 }
+#[test]
+#[cfg(all(feature="zeroes",not(feature="deferred-division")))]
+fn test_zeroes_normal(){
+	// (x-1)*(x+1)
+	// x^2-1
+	let zeroes=I32F32::zeroes2(I32F32::NEG_ONE,I32F32::ZERO,I32F32::ONE);
+	assert_eq!(zeroes,arrayvec::ArrayVec::from_iter([I32F32::NEG_ONE,I32F32::ONE]));
+	let zeroes=I32F32::zeroes2(I32F32::NEG_ONE*3,I32F32::ONE*2,I32F32::ONE);
+	assert_eq!(zeroes,arrayvec::ArrayVec::from_iter([I32F32::NEG_ONE*3,I32F32::ONE]));
+}
+#[test]
+#[cfg(all(feature="zeroes",feature="deferred-division"))]
+fn test_zeroes_deferred_division(){
+	// (x-1)*(x+1)
+	// x^2-1
+	let zeroes=I32F32::zeroes2(I32F32::NEG_ONE,I32F32::ZERO,I32F32::ONE);
+	assert_eq!(
+		zeroes,
+		arrayvec::ArrayVec::from_iter([
+			ratio_ops::ratio::Ratio::new(I32F32::ONE*2,I32F32::NEG_ONE*2),
+			ratio_ops::ratio::Ratio::new(I32F32::ONE*2,I32F32::ONE*2),
+		])
+	);
+}