diff --git a/news/fix-ci.rst b/news/fix-ci.rst
new file mode 100644
index 0000000..c0d8852
--- /dev/null
+++ b/news/fix-ci.rst
@@ -0,0 +1,23 @@
+**Added:**
+
+* No news added: Fix path separator mismatch for different platforms in the tests.
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* <news item>
+
+**Security:**
+
+* <news item>
diff --git a/tests/test_runmacro.py b/tests/test_runmacro.py
index a2545ba..cbd1be8 100644
--- a/tests/test_runmacro.py
+++ b/tests/test_runmacro.py
@@ -1,3 +1,4 @@
+import re
 from pathlib import Path
 
 import numpy
@@ -186,7 +187,7 @@ def test_command_processor(
         (
             'load structure foo from "/nonexistent/path.cif"',
             FileNotFoundError,
-            "structure /nonexistent/path.cif not found. "
+            f"structure {Path('/nonexistent/path.cif')} not found. "
             "Please ensure the path is correct and the file exists.",
         ),
         (
@@ -207,5 +208,5 @@ def test_command_processor(
 )
 def test_load_command_processor_bad(command_string, expected_exception, match):
     parser = MacroParser()
-    with pytest.raises(expected_exception, match=match):
+    with pytest.raises(expected_exception, match=re.escape(match)):
         parser.parse(command_string)