diff --git a/src/test_lib_json/main.cpp b/src/test_lib_json/main.cpp
index ae6abe0f4..1ef33bb5a 100644
--- a/src/test_lib_json/main.cpp
+++ b/src/test_lib_json/main.cpp
@@ -3632,9 +3632,12 @@ JSONTEST_FIXTURE_LOCAL(CharReaderAllowSpecialFloatsTest, issue209) {
   for (const auto& td : test_data) {
     bool ok = reader->parse(&*td.in.begin(), &*td.in.begin() + td.in.size(),
                             &root, &errs);
-    JSONTEST_ASSERT(td.ok == ok)
-        << "line:" << td.line << "\n  expected: {ok:" << td.ok << ", in:\'"
-        << td.in << "\'}\n  actual: {ok:" << ok << "}\n";
+    // clang-format off
+    JSONTEST_ASSERT(td.ok == ok) <<
+        "line:" << td.line << "\n  " <<
+        "expected: {ok:" << td.ok << ", in:\'" << td.in << "\'}\n " <<
+        "actual: {ok:" << ok << "}\n";
+    // clang-format on
   }
 
   {