diff --git a/.github/workflows/build-python-packages.yml b/.github/workflows/build-python-packages.yml
index 7c9aebe..5f38d06 100644
--- a/.github/workflows/build-python-packages.yml
+++ b/.github/workflows/build-python-packages.yml
@@ -127,7 +127,7 @@ jobs:
         run: |
           RHEL_VERSION=$(rpm -E %rhel)
           sudo dnf install -y "https://packages.microsoft.com/config/rhel/${RHEL_VERSION}/packages-microsoft-prod.rpm"
-          sudo dnf install -y powershell git
+          sudo dnf install -y powershell git tk
 
       - name: Check out repository code
         uses: actions/checkout@v6
diff --git a/tests/sources/python-config-test.py b/tests/sources/python-config-test.py
index cc47ec0..4aaa226 100644
--- a/tests/sources/python-config-test.py
+++ b/tests/sources/python-config-test.py
@@ -34,7 +34,8 @@ else:
 if pkg_installer:
     expected_lib_dir_path = f'/Library/Frameworks/{framework_name}/Versions/{version_major}.{version_minor}/lib'
 else:
-    expected_lib_dir_path = f'{os.getenv("AGENT_TOOLSDIRECTORY")}/Python/{version}/{architecture}/lib'
+    tools_dir = os.getenv("AGENT_TOOLSDIRECTORY") or os.getenv("RUNNER_TOOL_CACHE")
+    expected_lib_dir_path = f'{tools_dir}/Python/{version}/{architecture}/lib'
 
 # Check modules
 ### Validate libraries path