diff --git a/appveyor.yml b/appveyor.yml
index 99b2d8d..1ba3beb 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -82,8 +82,7 @@ test_script:
   - ctest -C %BUILD_CONFIG% --output-on-failure
   # run regression tests
   - IF "%BUILD_CONFIG%" == "Release" (
-      cd %EPANET_HOME%
-      tools\run-nrtest.cmd %REF_BUILD_ID% %SUT_BUILD_ID%
+      cd %EPANET_HOME% & tools\run-nrtest.cmd %REF_BUILD_ID% %SUT_BUILD_ID%
     )
 on_success:
   - cd %TEST_HOME%\benchmark