diff --git a/test/format-test.cc b/test/format-test.cc
index c189f990..3fceab88 100644
--- a/test/format-test.cc
+++ b/test/format-test.cc
@@ -1604,23 +1604,31 @@ TEST(FormatTest, MaxArgs) {
 }
 
 #if FMT_USE_USER_DEFINED_LITERALS
+// Passing user-defined literals directly to EXPECT_EQ causes problems
+// with macro argument stringification (#) on some versions of GCC.
+// Workaround: Assing the UDL result to a variable before the macro.
+
 using namespace fmt::literals;
 
 TEST(LiteralsTest, Format) {
-  EXPECT_EQ(format("{}c{}", "ab", 1), "{}c{}"_format("ab", 1));
-  EXPECT_EQ(format(L"{}c{}", L"ab", 1), L"{}c{}"_format(L"ab", 1));
+  auto udl_format = "{}c{}"_format("ab", 1);
+  EXPECT_EQ(format("{}c{}", "ab", 1), udl_format);
+  auto udl_format_w = L"{}c{}"_format(L"ab", 1);
+  EXPECT_EQ(format(L"{}c{}", L"ab", 1), udl_format_w);
 }
 
 TEST(LiteralsTest, NamedArg) {
+  auto udl_a = format("{first}{second}{first}{third}",
+                      "first"_a="abra", "second"_a="cad", "third"_a=99);
   EXPECT_EQ(format("{first}{second}{first}{third}",
                    fmt::arg("first", "abra"), fmt::arg("second", "cad"),
                    fmt::arg("third", 99)),
-            format("{first}{second}{first}{third}",
-                   "first"_a="abra", "second"_a="cad", "third"_a=99));
+            udl_a);
+  auto udl_a_w = format(L"{first}{second}{first}{third}",
+                        L"first"_a=L"abra", L"second"_a=L"cad", L"third"_a=99);
   EXPECT_EQ(format(L"{first}{second}{first}{third}",
                    fmt::arg(L"first", L"abra"), fmt::arg(L"second", L"cad"),
                    fmt::arg(L"third", 99)),
-            format(L"{first}{second}{first}{third}",
-                   L"first"_a=L"abra", L"second"_a=L"cad", L"third"_a=99));
+            udl_a_w);
 }
 #endif // FMT_USE_USER_DEFINED_LITERALS