diff --git a/.github/workflows/clang-tidy.yml b/.github/workflows/clang-tidy.yml
index e5b9636..286b718 100644
--- a/.github/workflows/clang-tidy.yml
+++ b/.github/workflows/clang-tidy.yml
@@ -12,16 +12,16 @@ on:
 
 jobs:
   clang-tidy:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
 
     steps:
     - name: Install clang
       run: |
         wget https://apt.llvm.org/llvm.sh
         chmod +x llvm.sh
-        sudo ./llvm.sh 21
-        sudo apt-get install -y clang-tidy-21
-        clang-tidy-21 --verify-config
+        sudo ./llvm.sh 20
+        sudo apt-get install -y clang-tidy-20
+        clang-tidy-20 --verify-config
 
     - name: Checkout repository
       uses: actions/checkout@v4
@@ -32,9 +32,9 @@ jobs:
       run: |
         mkdir build
         cd build
-        cmake .. -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DCMAKE_C_COMPILER=clang-21 -DCMAKE_CXX_COMPILER=clang++-21 -DDEV_CLANG_TIDY=ON -DSTATIC_LIBS=ON -DCMAKE_POLICY_VERSION_MINIMUM="3.5"
+        cmake .. -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DCMAKE_C_COMPILER=clang-20 -DCMAKE_CXX_COMPILER=clang++-20 -DDEV_CLANG_TIDY=ON -DSTATIC_LIBS=ON -DCMAKE_POLICY_VERSION_MINIMUM="3.5"
 
     - name: Run clang-tidy
       run: |
         cd src
-        clang-tidy-21 *.cpp -p ../build -checks=-clang-diagnostic-undefined-internal,-clang-analyzer-optin.performance.Padding,-clang-diagnostic-nan-infinity-disabled -warnings-as-errors=* -header-filter=^[^\.]
+        clang-tidy-20 *.cpp -p ../build -checks=-clang-diagnostic-undefined-internal,-clang-analyzer-optin.performance.Padding,-clang-diagnostic-nan-infinity-disabled -warnings-as-errors=* -header-filter=^[^\.]
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 3d4274a..bb40129 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -26,7 +26,7 @@ jobs:
       run: |
         wget https://apt.llvm.org/llvm.sh
         chmod +x llvm.sh
-        sudo ./llvm.sh 21 all
+        sudo ./llvm.sh 20 all
 
     - name: Checkout repository
       uses: actions/checkout@v4
@@ -38,7 +38,7 @@ jobs:
         cd tests
         mkdir build
         cd build
-        cmake .. -DCMAKE_BUILD_TYPE=Release -DDEV_DEBUG=ON -DWITH_COVERAGE=ON -DCMAKE_C_COMPILER=clang-21 -DCMAKE_CXX_COMPILER=clang++-21 -DCMAKE_POLICY_VERSION_MINIMUM="3.5"
+        cmake .. -DCMAKE_BUILD_TYPE=Release -DDEV_DEBUG=ON -DWITH_COVERAGE=ON -DCMAKE_C_COMPILER=clang-20 -DCMAKE_CXX_COMPILER=clang++-20 -DCMAKE_POLICY_VERSION_MINIMUM="3.5"
         make -j$(nproc) p2pool_tests
 
     - name: Run tests
@@ -50,12 +50,12 @@ jobs:
     - name: Merge profile data
       run: |
         cd tests/build
-        llvm-profdata-21 merge -sparse ./p2pool_tests.profraw -o ./p2pool_tests.profdata
+        llvm-profdata-20 merge -sparse ./p2pool_tests.profraw -o ./p2pool_tests.profdata
 
     - name: Export profile data
       run: |
         cd tests/build
-        llvm-cov-21 export ./p2pool_tests -format=lcov -instr-profile=./p2pool_tests.profdata > coverage.info
+        llvm-cov-20 export ./p2pool_tests -format=lcov -instr-profile=./p2pool_tests.profdata > coverage.info
 
     - name: Run genhtml
       run: |
diff --git a/tests/src/check_win7.py b/tests/src/check_win7.py
index 286e625..9e4b9bf 100644
--- a/tests/src/check_win7.py
+++ b/tests/src/check_win7.py
@@ -296,6 +296,9 @@ allowedAPIs = {
 	"CryptGenRandom",
 	"HeapQueryInformation",
 	"AreFileApisANSI",
+	"GetUserProfileDirectoryW",
+	"GetUserNameW",
+	"GetEnvironmentVariableW",
 }
 
 f = open(sys.argv[1], 'r')