diff --git a/test/unordered/detail_tests.cpp b/test/unordered/detail_tests.cpp
index daa89895..757f6aee 100644
--- a/test/unordered/detail_tests.cpp
+++ b/test/unordered/detail_tests.cpp
@@ -16,12 +16,17 @@ int main() {
     // Test that the prime list has the right length.
     // 
     // It would have been better to automatically set the length in the header
-    // but that doesn't work on some older compilers.
+    // but that doesn't work on some compilers. It's okay that this isn't tested
+    // on all compilers, as it really only needs to be checked on one.
+
+#if !defined(BOOST_MSVC)
 
     BOOST_TEST_EQ(
         boost::end(boost::unordered_detail::prime_list::value) -
         boost::begin(boost::unordered_detail::prime_list::value),
         boost::unordered_detail::prime_list::length);
+        
+#endif
 
     return boost::report_errors();
 }
\ No newline at end of file