diff --git a/src/lym/unit_tests/lymBasicTests.cc b/src/lym/unit_tests/lymBasicTests.cc
index 10a6a7362..d0b2eaf14 100644
--- a/src/lym/unit_tests/lymBasicTests.cc
+++ b/src/lym/unit_tests/lymBasicTests.cc
@@ -28,6 +28,7 @@
 #include "gsiInterpreter.h"
 #include "rba.h"
 #include "pya.h"
+#include "tlFileUtils.h"
 
 class TestCollectorConsole
   : public gsi::Console
@@ -52,6 +53,11 @@ private:
   std::string m_text;
 };
 
+static std::string np (const std::string &s)
+{
+  return tl::replaced (s, "\\", "/");
+}
+
 #if defined(HAVE_RUBY)
 
 TEST(1_BasicRuby)
@@ -120,7 +126,7 @@ TEST(3_RubyInclude)
     throw;
   }
 
-  EXPECT_EQ (console.text (), "An error in " + tl::testsrc () + "/testdata/lym/b_inc.rb:3\n");
+  EXPECT_EQ (np (console.text ()), np ("An error in " + tl::testsrc () + "/testdata/lym/b_inc.rb:3\n"));
 }
 
 TEST(11_DRCBasic)
diff --git a/src/tl/unit_tests/tlIncludeTests.cc b/src/tl/unit_tests/tlIncludeTests.cc
index bbb56dc66..924a4510c 100644
--- a/src/tl/unit_tests/tlIncludeTests.cc
+++ b/src/tl/unit_tests/tlIncludeTests.cc
@@ -26,6 +26,11 @@
 #include "tlStream.h"
 #include "tlInclude.h"
 
+static std::string np (const std::string &s)
+{
+  return tl::replaced (s, "\\", "/");
+}
+
 TEST(1_simple)
 {
   std::string fn = tl::testsrc () + "/testdata/tl/x.txt";
@@ -48,12 +53,12 @@ TEST(2_single_include)
   tl::IncludeExpander ie = tl::IncludeExpander::expand (fn, tl::InputStream (fn).read_all (), et);
   EXPECT_EQ (et, "A line\nincluded.1\nAnother line\n");
 
-  EXPECT_EQ (ie.to_string (), "@1*" + tl::testsrc () + "/testdata/tl/x_inc1.txt*0;2*" + tl::testsrc () + "/testdata/tl/inc1.txt*-1;3*" + tl::testsrc () + "/testdata/tl/x_inc1.txt*0;");
+  EXPECT_EQ (np (ie.to_string ()), np ("@1*" + tl::testsrc () + "/testdata/tl/x_inc1.txt*0;2*" + tl::testsrc () + "/testdata/tl/inc1.txt*-1;3*" + tl::testsrc () + "/testdata/tl/x_inc1.txt*0;"));
   EXPECT_EQ (tl::IncludeExpander::from_string (ie.to_string ()).to_string (), ie.to_string ());
 
   EXPECT_EQ (ie.translate_to_original (1).first, fn);
   EXPECT_EQ (ie.translate_to_original (1).second, 1);
-  EXPECT_EQ (ie.translate_to_original (2).first, tl::testsrc () + "/testdata/tl/inc1.txt");
+  EXPECT_EQ (np (ie.translate_to_original (2).first), np (tl::testsrc () + "/testdata/tl/inc1.txt"));
   EXPECT_EQ (ie.translate_to_original (2).second, 1);
   EXPECT_EQ (ie.translate_to_original (3).first, fn);
   EXPECT_EQ (ie.translate_to_original (3).second, 3);
@@ -71,11 +76,11 @@ TEST(3_multi_include)
 
   EXPECT_EQ (ie.translate_to_original (1).first, fn);
   EXPECT_EQ (ie.translate_to_original (1).second, 1);
-  EXPECT_EQ (ie.translate_to_original (2).first, tl::testsrc () + "/testdata/tl/inc3.txt");
+  EXPECT_EQ (np (ie.translate_to_original (2).first), np (tl::testsrc () + "/testdata/tl/inc3.txt"));
   EXPECT_EQ (ie.translate_to_original (2).second, 1);
-  EXPECT_EQ (ie.translate_to_original (3).first, tl::testsrc () + "/testdata/tl/inc2.txt");
+  EXPECT_EQ (np (ie.translate_to_original (3).first), np (tl::testsrc () + "/testdata/tl/inc2.txt"));
   EXPECT_EQ (ie.translate_to_original (3).second, 1);
-  EXPECT_EQ (ie.translate_to_original (5).first, tl::testsrc () + "/testdata/tl/inc3.txt");
+  EXPECT_EQ (np (ie.translate_to_original (5).first), np (tl::testsrc () + "/testdata/tl/inc3.txt"));
   EXPECT_EQ (ie.translate_to_original (5).second, 3);
   EXPECT_EQ (ie.translate_to_original (6).first, fn);
   EXPECT_EQ (ie.translate_to_original (6).second, 3);
@@ -93,11 +98,11 @@ TEST(4_multi_include_interpolate)
 
   EXPECT_EQ (ie.translate_to_original (1).first, fn);
   EXPECT_EQ (ie.translate_to_original (1).second, 1);
-  EXPECT_EQ (ie.translate_to_original (2).first, tl::testsrc () + "/testdata/tl/inc3.txt");
+  EXPECT_EQ (np (ie.translate_to_original (2).first), np (tl::testsrc () + "/testdata/tl/inc3.txt"));
   EXPECT_EQ (ie.translate_to_original (2).second, 1);
-  EXPECT_EQ (ie.translate_to_original (3).first, tl::testsrc () + "/testdata/tl/inc2.txt");
+  EXPECT_EQ (np (ie.translate_to_original (3).first), np (tl::testsrc () + "/testdata/tl/inc2.txt"));
   EXPECT_EQ (ie.translate_to_original (3).second, 1);
-  EXPECT_EQ (ie.translate_to_original (5).first, tl::testsrc () + "/testdata/tl/inc3.txt");
+  EXPECT_EQ (np (ie.translate_to_original (5).first), np (tl::testsrc () + "/testdata/tl/inc3.txt"));
   EXPECT_EQ (ie.translate_to_original (5).second, 3);
   EXPECT_EQ (ie.translate_to_original (6).first, fn);
   EXPECT_EQ (ie.translate_to_original (6).second, 3);