diff --git a/include/nlohmann/detail/output/serializer.hpp b/include/nlohmann/detail/output/serializer.hpp
index 8c48e36e..090f22b1 100644
--- a/include/nlohmann/detail/output/serializer.hpp
+++ b/include/nlohmann/detail/output/serializer.hpp
@@ -463,7 +463,7 @@ class serializer
                             continue;
                         }
                     }
-                    break;
+                    break;  // LCOV_EXCL_LINE
                 }
 
                 default:  // decode found yet incomplete multi-byte code point
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 9bb67ff1..c2295399 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -11161,7 +11161,7 @@ class serializer
                             continue;
                         }
                     }
-                    break;
+                    break;  // LCOV_EXCL_LINE
                 }
 
                 default:  // decode found yet incomplete multi-byte code point