diff --git a/skimage/_shared/testing.py b/skimage/_shared/testing.py
index 5ac3574a..301d25ec 100644
--- a/skimage/_shared/testing.py
+++ b/skimage/_shared/testing.py
@@ -186,7 +186,7 @@ def setup_test():
     Import packages known to raise warnings, and then
     force warnings to raise errors.
 
-    Also set a random seed.
+    Also set the random seed to zero.
     """
     warnings.simplefilter('default')