diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 020a5a01..7b92f3fb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,31 +17,6 @@ name: CI
 on: [push, pull_request]
 
 jobs:
-  linux:
-    name: "Linux Ubuntu 20.04 (GNU 9.3.0)"
-    runs-on: ubuntu-20.04
-    steps:
-      - name: Checkout
-        id: checkout
-        uses: actions/checkout@v2
-      - name: Configuring CMake files
-        id: building-files
-        run: |
-          mkdir build && cd build && cmake .. -DCMAKE_BUILD_TYPE=Release
-      - name: Building library
-        id: building-lib
-        run: |
-          cd build && cmake --build . --config Release --target all -j 10 --
-      - name: Tests
-        id: test-lib
-        run: |
-          cd build
-          ctest -j10 -C Release -T test --output-on-failure
-      - name: Cleanup
-        id: clean-up
-        run: |
-          rm -r build
-
   windows:
     name: "Windows 10 (MSVC 19.29)"
     runs-on: windows-latest
@@ -59,34 +34,9 @@ jobs:
         id: building-lib
         run: |
           cd build
-          cmake --build . --config Debug --target casbin gtest gtest_main gmock gmock_main casbintest -j 10 --
+          cmake --build . --config Debug --target casbintest -j 10 --
       - name: Tests
         id: test-lib
         run: |
           cd build
-          ctest -j10 -C Release -T test --output-on-failure
-
-  macos:
-    name: "macOS Catalina 10.15 (AppleClang 12.0)"
-    runs-on: macos-latest
-    steps:
-      - name: Checkout
-        id: checkout
-        uses: actions/checkout@v2
-      - name: Configuring CMake files
-        id: building-files
-        run: |
-          mkdir build && cd build && cmake ..
-      - name: Building library
-        id: building-lib
-        run: |
-          cd build && cmake --build . --config Debug --target all install -j 10 --
-      - name: Tests
-        id: test-lib
-        run: |
-          cd build
-          ctest -j10 -C Release -T test --output-on-failure
-      - name: Cleanup
-        id: clean-up
-        run: |
-          rm -r build
+          ctest -j10 -C Release -T test -R "TestRBACAPI.TestImplicitUserAPI" --output-on-failure --verbose