diff --git a/tests/oracle/cases/hooks.mjs b/tests/oracle/cases/hooks.mjs
index 915fc92de..b3a6d7a77 100644
--- a/tests/oracle/cases/hooks.mjs
+++ b/tests/oracle/cases/hooks.mjs
@@ -182,6 +182,10 @@ export default [
   { id: 'hadmin-ignore-value-missing', verb: 'hook-admin', workspace: 'hook-project', args: ['ignore-value', 'overused-font'], files: CACHE_FILES },
   { id: 'hadmin-ignore-value-unknown-flag', verb: 'hook-admin', workspace: 'hook-project', args: ['ignore-value', 'overused-font', 'Inter', '--wat'], files: CACHE_FILES },
   { id: 'hadmin-ignore-value-twice-updates-reason', verb: 'hook-admin', workspace: 'hook-project', files: CACHE_FILES, steps: [{ args: ['ignore-value', 'overused-font', 'Inter'] }, { args: ['ignore-value', 'overused-font', 'inter', '--reason=second'] }, { args: ['status'] }] },
+  // upstream be87f5eb (#662): exact values for rules that cannot extract one are inert and refused
+  { id: 'hadmin-ignore-value-inert-exact', verb: 'hook-admin', workspace: 'hook-project', args: ['ignore-value', 'cramped-padding', 'padding: 4px 8px'], files: CACHE_FILES },
+  { id: 'hadmin-ignore-value-inert-scoped', verb: 'hook-admin', workspace: 'hook-project', args: ['ignore-value', 'side-tab', 'Inter', '--file', 'a.css'], files: CACHE_FILES },
+  { id: 'hadmin-ignore-value-inert-then-wildcard', verb: 'hook-admin', workspace: 'hook-project', files: CACHE_FILES, steps: [{ args: ['ignore-value', 'cramped-padding', 'padding: 4px 8px'] }, { args: ['ignore-value', 'cramped-padding', '*', '--file', 'index.html'] }, { args: ['status'] }] },
   { id: 'hadmin-reset-empty', verb: 'hook-admin', workspace: 'hook-project', args: ['reset'], files: CACHE_FILES },
   { id: 'hadmin-full-cycle', verb: 'hook-admin', workspace: 'hook-project', files: CACHE_FILES, steps: [{ args: ['ignore-rule', 'side-tab'] }, { args: ['ignore-file', 'x/**', '--local'] }, { args: ['ignore-value', 'overused-font', 'Inter'] }, { args: ['status'] }, { args: ['reset'] }, { args: ['status'] }] },
   {
diff --git a/tests/oracle/golden/hadmin-ignore-value-inert-exact.json b/tests/oracle/golden/hadmin-ignore-value-inert-exact.json
new file mode 100644
index 000000000..97428c9b8
--- /dev/null
+++ b/tests/oracle/golden/hadmin-ignore-value-inert-exact.json
@@ -0,0 +1,7 @@
+{
+  "stdout": "",
+  "stderr": "Error: cramped-padding has no extractable ignore value. Use /impeccable hooks ignore-value cramped-padding \"*\" --file <glob> to suppress it in matching files.\n",
+  "exit": 1,
+  "signal": null,
+  "files": {}
+}
diff --git a/tests/oracle/golden/hadmin-ignore-value-inert-scoped.json b/tests/oracle/golden/hadmin-ignore-value-inert-scoped.json
new file mode 100644
index 000000000..e79c254c9
--- /dev/null
+++ b/tests/oracle/golden/hadmin-ignore-value-inert-scoped.json
@@ -0,0 +1,7 @@
+{
+  "stdout": "",
+  "stderr": "Error: side-tab has no extractable ignore value. Use /impeccable hooks ignore-value side-tab \"*\" --file <glob> to suppress it in matching files.\n",
+  "exit": 1,
+  "signal": null,
+  "files": {}
+}
diff --git a/tests/oracle/golden/hadmin-ignore-value-inert-then-wildcard.json b/tests/oracle/golden/hadmin-ignore-value-inert-then-wildcard.json
new file mode 100644
index 000000000..bb178c016
--- /dev/null
+++ b/tests/oracle/golden/hadmin-ignore-value-inert-then-wildcard.json
@@ -0,0 +1,25 @@
+{
+  "steps": [
+    {
+      "stdout": "",
+      "stderr": "Error: cramped-padding has no extractable ignore value. Use /impeccable hooks ignore-value cramped-padding \"*\" --file <glob> to suppress it in matching files.\n",
+      "exit": 1,
+      "signal": null
+    },
+    {
+      "stdout": "Added cramped-padding=* scoped to index.html to shared detector.ignoreValues (.impeccable/config.json).\n",
+      "stderr": "",
+      "exit": 0,
+      "signal": null
+    },
+    {
+      "stdout": "Impeccable design hook\n  state:        enabled\n  shared file:  .impeccable/config.json\n  local file:   .impeccable/config.local.json (not present)\n  ignoreRules:  (none)\n  ignoreFiles:  (none)\n  ignoreValues: cramped-padding=* [index.html]\n  maxFindings:  5\n  maxChars:     8000\n  env override: unset\n  cache file:   .impeccable/hook.cache.json (not present)\n",
+      "stderr": "",
+      "exit": 0,
+      "signal": null
+    }
+  ],
+  "files": {
+    ".impeccable/config.json": "{\n  \"detector\": {\n    \"ignoreRules\": [],\n    \"ignoreFiles\": [],\n    \"ignoreValues\": [\n      {\n        \"rule\": \"cramped-padding\",\n        \"value\": \"*\",\n        \"files\": [\n          \"index.html\"\n        ],\n        \"createdAt\": \"<ISO>\"\n      }\n    ]\n  }\n}\n"
+  }
+}