diff --git a/test/test-suite/test_foreign.py b/test/test-suite/test_foreign.py
index b32c1da1..6cc6c792 100644
--- a/test/test-suite/test_foreign.py
+++ b/test/test-suite/test_foreign.py
@@ -260,16 +260,16 @@ class TestForeign:
 
         # higher Q should mean a bigger buffer
         q10 = im.jpegsave_buffer(Q=10)
-        q10o = im.jpegsave_buffer(Q=10, subsample_mode=2)
+        q10_subsample_off = im.jpegsave_buffer(Q=10, subsample_mode=2)
         q90 = im.jpegsave_buffer(Q=90)
         assert len(q90) > len(q10)
-        assert len(q10o) > len(q10)
+        assert len(q10_subsample_off) > len(q10)
 
         # force subsampling should result in smaller buffer
-        q90s = im.jpegsave_buffer(Q=90, subsample_mode=1)
-        q90a = im.jpegsave_buffer(Q=90, subsample_mode=0)
-        assert len(q90) > len(q90s)
-        assert len(q90) == len(q90a)
+        q90_subsample_on = im.jpegsave_buffer(Q=90, subsample_mode=1)
+        q90_subsample_auto = im.jpegsave_buffer(Q=90, subsample_mode=0)
+        assert len(q90) > len(q90_subsample_on)
+        assert len(q90) == len(q90_subsample_auto)
 
     @skip_if_no("jpegload")
     def test_truncated(self):