diff --git a/klusta/traces/tests/test_filter.py b/klusta/traces/tests/test_filter.py
index 3ed1e5e..72b98d7 100644
--- a/klusta/traces/tests/test_filter.py
+++ b/klusta/traces/tests/test_filter.py
@@ -20,7 +20,7 @@
 def test_apply_filter():
     """Test bandpass filtering on a combination of two sinusoids."""
 
-    rate = 10000.
+    rate = 10000
     low, high = 100., 200.
 
     # Create a signal with small and high frequencies.