diff --git a/test/core-test.cc b/test/core-test.cc
index 9aef6aa9..c3706002 100644
--- a/test/core-test.cc
+++ b/test/core-test.cc
@@ -455,9 +455,9 @@ FMT_END_NAMESPACE
 TEST(CoreTest, HasFormatter) {
   using fmt::has_formatter;
   using context = fmt::format_context;
-  static_assert(has_formatter<enabled_formatter, context>::value);
-  static_assert(!has_formatter<disabled_formatter, context>::value);
-  static_assert(!has_formatter<disabled_formatter_convertible, context>::value);
+  static_assert(has_formatter<enabled_formatter, context>::value, "");
+  static_assert(!has_formatter<disabled_formatter, context>::value, "");
+  static_assert(!has_formatter<disabled_formatter_convertible, context>::value, "");
 }
 
 struct convertible_to_int {
diff --git a/test/format-test.cc b/test/format-test.cc
index 165a1425..0dce6bad 100644
--- a/test/format-test.cc
+++ b/test/format-test.cc
@@ -1975,7 +1975,7 @@ TEST(FormatTest, Enum) { EXPECT_EQ("0", fmt::format("{}", A)); }
 
 TEST(FormatTest, FormatterNotSpecialized) {
   static_assert(!fmt::has_formatter<fmt::formatter<TestEnum>,
-                                    fmt::format_context>::value);
+                                    fmt::format_context>::value, "");
 }
 
 #if FMT_HAS_FEATURE(cxx_strong_enums)