diff --git a/appveyor-build.cmd b/appveyor-build.cmd
index 8e48adb6ec4..606334f604f 100644
--- a/appveyor-build.cmd
+++ b/appveyor-build.cmd
@@ -81,7 +81,6 @@ REM Disabled while working out perl problem, see https://github.com/Microsoft/vi
 REM call RunTests.cmd debug fsharpqa Smoke
 REM @if ERRORLEVEL 1 echo Error: 'RunTests.cmd debug fsharpqa Smoke' failed && goto :eof
 
-set PATH=%PATH%;%~dp0%packages\NUnit.Runners.2.6.3\tools\
 call RunTests.cmd debug coreunit
 @if ERRORLEVEL 1 echo Error: 'RunTests.cmd debug coreunit' failed && goto :eof