diff --git a/scripts/refresh_data_dirs.py b/scripts/refresh_data_dirs.py
index a7059e666..64568a753 100644
--- a/scripts/refresh_data_dirs.py
+++ b/scripts/refresh_data_dirs.py
@@ -27,7 +27,7 @@ import zipfile
 from collections.abc import Iterator
 from pathlib import Path
 from artifacts import file_lock as _file_lock, set_plain_mode
-from common import github_token, platform_arg, require_platform, yaml_load
+from common import github_token, platform_arg, require_platform, suggest_names, yaml_load
 
 try:
     import yaml
@@ -607,7 +607,7 @@ def main() -> None:
 
     if args.key:
         if args.key not in registry:
-            log.error("unknown key: %s (available: %s)", args.key, ", ".join(registry))
+            log.error("unknown key: %s. %s", args.key, suggest_names([args.key], list(registry), "--dry-run"))
             raise SystemExit(1)
         allowed = registry[args.key].get("for_platforms")
         if args.platform and allowed and args.platform not in allowed:
diff --git a/tests/test_tool_messages.py b/tests/test_tool_messages.py
index adfcdd59d..ca05417ed 100644
--- a/tests/test_tool_messages.py
+++ b/tests/test_tool_messages.py
@@ -83,6 +83,20 @@ class AMistypedTargetGetsTheClosestName(unittest.TestCase):
         self.assertNotIn("board-0", message)
 
 
+
+class AMistypedDataKeyGetsTheClosestName(unittest.TestCase):
+    """`--key dolphin-sis` printed all 27 keys on one line."""
+
+    def test_did_you_mean(self):
+        proc = subprocess.run(
+            [sys.executable, "scripts/refresh_data_dirs.py", "--key", "dolphin-sis", "--dry-run"],
+            cwd=REPO_ROOT, capture_output=True, text=True, check=False,
+        )
+        self.assertEqual(proc.returncode, 1)
+        self.assertIn("unknown key: dolphin-sis. Did you mean: dolphin-sys? --dry-run lists all",
+                      proc.stderr)
+        self.assertNotIn("ppsspp-assets", proc.stderr)
+
 class TheTruthDiffShowsWhereAndAsksNothing(unittest.TestCase):
     """The markdown wrote `**Remove** hiscore.dat (phantom)` beside six
     `**Add** hiscore.dat`, none with a path, for files profiled cores read."""