diff --git a/src/tl/unit_tests/tlIncludeTests.cc b/src/tl/unit_tests/tlIncludeTests.cc
index 8ed1651fd..cad6fc58e 100644
--- a/src/tl/unit_tests/tlIncludeTests.cc
+++ b/src/tl/unit_tests/tlIncludeTests.cc
@@ -28,6 +28,7 @@
 
 static std::string np (const std::string &s)
 {
+  return tl::replaced (s, "\\\\", "/");
   return tl::replaced (s, "\\", "/");
 }