diff --git a/appveyor.yml b/appveyor.yml
index c854c6d3..aebb5344 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -181,7 +181,7 @@ test_script:
     - type %APPVEYOR_BUILD_FOLDER%\test\functional\sqlsrv.log
     - php run-tests.php -p php.exe %APPVEYOR_BUILD_FOLDER%\test\functional\pdo_sqlsrv\*.phpt > %APPVEYOR_BUILD_FOLDER%\test\functional\pdo_sqlsrv.log 2>&1    
     - type %APPVEYOR_BUILD_FOLDER%\test\functional\pdo_sqlsrv.log
-    - OpenCppCoverage.exe --sources %APPVEYOR_BUILD_FOLDER%\source --modules *sqlsrv*.dll --export_type=cobertura:coverage.xml -- php %APPVEYOR_BUILD_FOLDER%\test\functional\sqlsrv\sqlsrv_param_input_variants.phpt
+    - OpenCppCoverage.exe --sources %APPVEYOR_BUILD_FOLDER%\source --modules *sqlsrv*.dll --export_type=cobertura:coverage.xml -- .\php.exe %APPVEYOR_BUILD_FOLDER%\test\functional\sqlsrv\sqlsrv_param_input_variants.phpt
     - python %APPVEYOR_BUILD_FOLDER%\test\functional\setup\cleanup_dbs.py -dbname %SQLSRV_DBNAME%
     - python %APPVEYOR_BUILD_FOLDER%\test\functional\setup\cleanup_dbs.py -dbname %PDOSQLSRV_DBNAME%