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-rw-r--r--coverage/files.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/coverage/files.py b/coverage/files.py
index f3fafdf..c16f113 100644
--- a/coverage/files.py
+++ b/coverage/files.py
@@ -31,7 +31,7 @@ class FileLocator:
An absolute path with no redundant components and normalized case.
"""
- if not self.canonical_filename_cache.has_key(filename):
+ if filename not in self.canonical_filename_cache:
f = filename
if os.path.isabs(f) and not os.path.exists(f):
if not self.get_zip_data(f):