diff --git a/test/format-impl-test.cc b/test/format-impl-test.cc
index b5d92227..a8994bc0 100644
--- a/test/format-impl-test.cc
+++ b/test/format-impl-test.cc
@@ -62,7 +62,8 @@ TEST(FormatTest, StrError) {
   char *message = 0;
   char buffer[BUFFER_SIZE];
   EXPECT_ASSERT(fmt::safe_strerror(EDOM, message = 0, 0), "invalid buffer");
-  EXPECT_ASSERT(fmt::safe_strerror(EDOM, message = buffer, 0), "invalid buffer");
+  EXPECT_ASSERT(fmt::safe_strerror(EDOM, message = buffer, 0),
+                "invalid buffer");
   buffer[0] = 'x';
 #if defined(_GNU_SOURCE) && !defined(__COVERITY__)
   // Use invalid error code to make sure that safe_strerror returns an error