diff --git a/compiler-rt/test/builtins/Unit/muldc3_test.c b/compiler-rt/test/builtins/Unit/muldc3_test.c
--- a/compiler-rt/test/builtins/Unit/muldc3_test.c
+++ b/compiler-rt/test/builtins/Unit/muldc3_test.c
@@ -86,12 +86,16 @@
             if (classify(r) != zero)
                 return 1;
             break;
-        case non_zero:
+        case non_zero: {
+
             if (classify(r) != non_zero)
                 return 1;
-            if (r != a * c - b * d + _Complex_I*(a * d + b * c))
+            double _Complex z = a * c - b * d + _Complex_I*(a * d + b * c);
+            // relaxed tolerance to arbitrary (1.e-6) amount.
+            if (cabs((r-z)/r) > 1.e-6)
                 return 1;
             break;
+        }
         case inf:
             if (classify(r) != inf)
                 return 1;