diff --git a/workflow/.tests/unit/test_amplicon_cov.py b/workflow/.tests/unit/test_amplicon_cov.py
index a814673..add285c 100644
--- a/workflow/.tests/unit/test_amplicon_cov.py
+++ b/workflow/.tests/unit/test_amplicon_cov.py
@@ -1,6 +1,5 @@
 """Tests for the `amplicon_cov` rules."""
 
-
 import os
 import subprocess as sp
 from tempfile import TemporaryDirectory