diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2658cd290..eeeb920f8 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,11 +13,26 @@ jobs:
 
   spm-build-test:
     runs-on: macOS-latest
+    env:
+      DEVELOPER_DIR: /Applications/Xcode_12.4.app/Contents/Developer
     steps:
     - uses: actions/checkout@v2
-    - name: Build unit test target
-      run: swift build
-    - name: Run unit test target
-      run: swift test --enable-code-coverage
+    - name: Remove AppAuth.xcodeproj
+      run: rm -rf AppAuth.xcodeproj
+    - name: Build unit test targets
+      run: |
+        xcodebuild build-for-testing \
+          -scheme AppAuth-Package \
+          -sdk 'iphonesimulator' \
+          -destination 'platform=iOS Simulator,name=iPhone 11' \
+    - name: Run unit test targets
+      run: |
+        xcodebuild test-without-building \
+          -scheme AppAuth-Package \
+          -sdk 'iphonesimulator' \
+          -destination 'platform=iOS Simulator,name=iPhone 11' \
+          -enableCodeCoverage YES \
+          GCC_INSTRUMENT_PROGRAM_FLOW_ARCS=YES \
+          GCC_GENERATE_TEST_COVERAGE_FILES=YES
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v2