diff --git a/appveyor.yml b/appveyor.yml
index 0211f15c4..388acccf3 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -21,7 +21,10 @@ install:
   - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
   - "python --version"
   - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
-  - ""%CMD_IN_ENV% pip install numpy scipy nose"
+  - "%CMD_IN_ENV% pip install numpy scipy nose"
 
 build:
   project: windows\xgboost.sln
+
+test_script:
+  - "%CMD_IN_ENV% nosetests test\\python"
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