diff --git a/lldb/packages/Python/lldbsuite/test/decorators.py b/lldb/packages/Python/lldbsuite/test/decorators.py
index a391319ca9b0e..a5f58373ede75 100644
--- a/lldb/packages/Python/lldbsuite/test/decorators.py
+++ b/lldb/packages/Python/lldbsuite/test/decorators.py
@@ -1155,6 +1155,7 @@ def skipIfBuildType(types: list[str]):
     """
     types = [name.lower() for name in types]
     return unittest.skipIf(
-        configuration.cmake_build_type.lower() in types,
+        configuration.cmake_build_type is not None
+        and configuration.cmake_build_type.lower() in types,
         "skip on {} build type(s)".format(", ".join(types)),
     )