diff --git a/test_regress/t/t_dist_contributors.py b/test_regress/t/t_dist_contributors.py
index aaffa870f..ec12fa53d 100755
--- a/test_regress/t/t_dist_contributors.py
+++ b/test_regress/t/t_dist_contributors.py
@@ -59,13 +59,23 @@ def check():
             print("Check: " + author)
         if re.search(r'\[bot\]', author):
             continue
-        if author not in Contributors:
-            test.error("Certify your contribution by sorted-inserting '" + author +
-                       "' into docs/CONTRIBUTORS.\n"
-                       "   If '" + author +
-                       "' is not your real name, please fix 'name=' in ~/.gitconfig\n"
-                       "   Also check your https://github.com account's Settings->Profile->Name\n"
-                       "   matches your ~/.gitconfig 'name='.\n")
+        if author in Contributors:
+            continue
+        # Slower subset-of-string test
+        ok = False
+        for contrib2 in sorted(Contributors.keys()):
+            if author in contrib2:
+                ok = True
+                break
+        if ok:
+            continue
+
+        test.error("Certify your contribution by sorted-inserting '" + author +
+                   "' into docs/CONTRIBUTORS.\n"
+                   "   If '" + author +
+                   "' is not your real name, please fix 'name=' in ~/.gitconfig\n"
+                   "   Also check your https://github.com account's Settings->Profile->Name\n"
+                   "   matches your ~/.gitconfig 'name='.\n")
 
 
 if 'VERILATOR_TEST_NO_CONTRIBUTORS' in os.environ: