diff --git a/shellhist/tests/test_patterns.py b/shellhist/tests/test_patterns.py
index 86cd6f3..7093ada 100644
--- a/shellhist/tests/test_patterns.py
+++ b/shellhist/tests/test_patterns.py
@@ -1,10 +1 @@
-"""Tests for pattern detection algorithms."""
-
-from shellhist.core import HistoryEntry, HistoryStore
-from shellhist.core.patterns import (
-    ngram_analysis,
-    detect_repetitive_commands,
-    detect_command_pairs,
-    detect_command_triplets,
-    detect_common_sequences,
-)
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