diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index 8e85f527..e07a277e 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -32,7 +32,7 @@ jobs:
           python-version: "3.x"
 
       - name: Install Dependencies
-        run: pip install mkdocs-material pymdown-extensions
+        run: pip install "mkdocs<2.0" mkdocs-material pymdown-extensions
 
       - name: Build and Deploy Docs
-        run: mkdocs gh-deploy --force
+        run: mkdocs gh-deploy --force
\ No newline at end of file
diff --git a/tests/core_engine/test_language_lens.py b/tests/core_engine/test_language_lens.py
index 05bd9d43..8029f37d 100644
--- a/tests/core_engine/test_language_lens.py
+++ b/tests/core_engine/test_language_lens.py
@@ -190,12 +190,12 @@ def test_tier_3_lexical_scan(isolated_detector):
 # ==============================================================================
 def test_tier_4_heuristic_discovery(isolated_detector):
     """Proves the engine can blindly identify a file with no extension."""
-    import os
-
+    
     # Needs > 20 lines to trigger Tier 4. We inject C-style comments and structure.
+    # Hardcoded \n newlines to bypass Windows \r\n Universal Newline artifacts in CI
     content = (
-        f"// C-style comment{os.linesep}" * 25
-        + f"int main() {{ return 0; }}{os.linesep}" * 5
+        "// C-style comment\n" * 25
+        + "int main() { return 0; }\n" * 5
     )
 
     result = isolated_detector.inspect(