diff --git a/lldb/packages/Python/lldbsuite/test/decorators.py b/lldb/packages/Python/lldbsuite/test/decorators.py
index c0813f191c8f..cacd718f7837 100644
--- a/lldb/packages/Python/lldbsuite/test/decorators.py
+++ b/lldb/packages/Python/lldbsuite/test/decorators.py
@@ -810,6 +810,6 @@ def skipUnlessFeature(feature):
 def skipIfSanitized(func):
     """Skip this test if the environment is set up to run LLDB itself under ASAN."""
     def is_sanitized():
-        return (('DYLD_INSERT_LIBRARIES' in os.env) and
-                'libclang_rt.asan' in os.env['DYLD_INSERT_LIBRARIES'])
+        return (('DYLD_INSERT_LIBRARIES' in os.environ) and
+                'libclang_rt.asan' in os.environ['DYLD_INSERT_LIBRARIES'])
     return skipTestIfFn(is_sanitized)(func)