diff --git a/flang/unittests/Runtime/external-hello.cpp b/flang/unittests/Runtime/external-hello.cpp
--- a/flang/unittests/Runtime/external-hello.cpp
+++ b/flang/unittests/Runtime/external-hello.cpp
@@ -13,9 +13,11 @@
   IONAME(OutputReal64)(io, 0.0);
   IONAME(OutputReal64)(io, 2.0 / 3.0);
   IONAME(OutputReal64)(io, 1.0e99);
+#ifndef _MSC_VER
   IONAME(OutputReal64)(io, 1.0 / 0.0);
   IONAME(OutputReal64)(io, -1.0 / 0.0);
   IONAME(OutputReal64)(io, 0.0 / 0.0);
+#endif
   IONAME(OutputComplex64)(io, 123.0, -234.0);
   IONAME(OutputLogical)(io, false);
   IONAME(OutputLogical)(io, true);