diff --git a/libcxx/utils/libcxx/test/features/availability.py b/libcxx/utils/libcxx/test/features/availability.py
index c312a7cf830ed..39c6cf45a1708 100644
--- a/libcxx/utils/libcxx/test/features/availability.py
+++ b/libcxx/utils/libcxx/test/features/availability.py
@@ -29,28 +29,28 @@
     Feature(
         name="_target-has-llvm-20",
         when=lambda cfg: BooleanExpression.evaluate(
-            "_target-has-llvm-21 || target={{.+}}-apple-macosx{{26.[0-9](.\d+)?}}",
+            r"_target-has-llvm-21 || target={{.+}}-apple-macosx{{26.[0-9](.\d+)?}}",
             cfg.available_features,
         ),
     ),
     Feature(
         name="_target-has-llvm-19",
         when=lambda cfg: BooleanExpression.evaluate(
-            "_target-has-llvm-20 || target={{.+}}-apple-macosx{{15.[4-9](.\d+)?}}",
+            r"_target-has-llvm-20 || target={{.+}}-apple-macosx{{15.[4-9](.\d+)?}}",
             cfg.available_features,
         ),
     ),
     Feature(
         name="_target-has-llvm-18",
         when=lambda cfg: BooleanExpression.evaluate(
-            "_target-has-llvm-19 || target={{.+}}-apple-macosx{{15.[0-3](.\d+)?}}",
+            r"_target-has-llvm-19 || target={{.+}}-apple-macosx{{15.[0-3](.\d+)?}}",
             cfg.available_features,
         ),
     ),
     Feature(
         name="_target-has-llvm-17",
         when=lambda cfg: BooleanExpression.evaluate(
-            "_target-has-llvm-18 || target={{.+}}-apple-macosx{{14.[4-9](.\d+)?}}",
+            r"_target-has-llvm-18 || target={{.+}}-apple-macosx{{14.[4-9](.\d+)?}}",
             cfg.available_features,
         ),
     ),