diff --git a/ci/build.ps1 b/ci/build.ps1
index 71cc7c5b50..d530bbad52 100644
--- a/ci/build.ps1
+++ b/ci/build.ps1
@@ -114,7 +114,7 @@ if ($uploadToCodecov) {
 }
 
 # Old tests
-$env:PATH += ';C:\msys64\usr\bin'
+$env:PATH = "C:\msys64\usr\bin;$env:PATH"
 & "C:\msys64\mingw$bits\bin\mingw32-make.exe" -C $(Convert-Path ..\src\nvim\testdir) VERBOSE=1
 
 if ($uploadToCodecov) {