diff --git a/test/tts.hpp b/test/tts.hpp
index 6264054..637a3bd 100644
--- a/test/tts.hpp
+++ b/test/tts.hpp
@@ -1502,9 +1502,9 @@ namespace detail
 #define TTS_PRECISION_IMPL(LHS, RHS, N, UNIT, FUNC, PREC,FAILURE)                                   \
 [&](auto local_tts_lhs, auto local_tts_rhs)                                                         \
 {                                                                                                   \
-  auto r = FUNC (local_tts_lhs,local_tts_rhs);                                                      \
+  auto local_tts_r = FUNC (local_tts_lhs,local_tts_rhs);                                            \
                                                                                                     \
-  if(r <= N)                                                                                        \
+  if(local_tts_r <= N)                                                                              \
   {                                                                                                 \
     ::tts::global_runtime.pass(); return ::tts::detail::logger{false};                              \
   }                                                                                                 \
@@ -1515,7 +1515,7 @@ namespace detail
                             << ::tts::as_string(local_tts_lhs)                                      \
                             << " == " << ::tts::as_string(local_tts_rhs)                            \
                             << " within " << std::setprecision(PREC) << std::fixed                  \
-                            << r << std::defaultfloat                                               \
+                            << local_tts_r << std::defaultfloat                                     \
                             << " " << UNIT << " when "                                              \
                             << std::setprecision(PREC) <<  std::fixed                               \
                             << N << std::defaultfloat                                               \