diff --git a/appveyor.yml b/appveyor.yml
index 3736327a..e9e581e1 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -12,5 +12,5 @@ install:
   - "%PYTHON%/Scripts/pip.exe install matplotlib"
 
 test_script:
-    - "%PYTHON%\python.exe -m unittest discover C:\projects\pythonrobotics\tests"
+    - "%PYTHON%\python.exe -m unittest discover C:/projects/pythonrobotics/tests"