diff --git a/fixed_wide/src/tests.rs b/fixed_wide/src/tests.rs
index 3234541..26ec4f3 100644
--- a/fixed_wide/src/tests.rs
+++ b/fixed_wide/src/tests.rs
@@ -54,3 +54,8 @@ fn test_sqrt_exact(){
 		test_exact(n);
 	}
 }
+#[test]
+fn test_sqrt_max(){
+	let a=I32F32::MAX;
+	test_exact(a);
+}