diff --git a/appveyor.yml b/appveyor.yml
index 89003c4..4615eae 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -13,7 +13,7 @@ build_script:
 - ps: ./Build.ps1
 test_script:
   - nuget.exe install OpenCover -ExcludeVersion
-  - OpenCover\tools\OpenCover.Console.exe -register:user -filter:"+[Mime-Detective]*" -target:"dotnet.exe" "-targetargs:test .\test\Mime-Detective.Tests" -returntargetcode -hideskipped:All -output:coverage.xml
+  - OpenCover\tools\OpenCover.Console.exe -register:user -target:"dotnet.exe" "-targetargs:test .\test\Mime-Detective.Tests" -returntargetcode -hideskipped:All -output:coverage.xml
   - "SET PATH=C:\\Python34;C:\\Python34\\Scripts;%PATH%"
   - pip install codecov
   - codecov -f "coverage.xml"
@@ -32,4 +32,4 @@ deploy:
   artifact: /Mime-Detective.*\.nupkg/
   tag: v$(appveyor_build_version)
   on:
-    branch: master
\ No newline at end of file
+    branch: master