diff --git a/packages/command-registry/package.json b/packages/command-registry/package.json
index 3fef336010..43190fd6d0 100644
--- a/packages/command-registry/package.json
+++ b/packages/command-registry/package.json
@@ -95,5 +95,8 @@
       "types": "./src/cli-command-aliases.ts",
       "default": "./src/cli-command-aliases.ts"
     }
+  },
+  "devDependencies": {
+    "fast-check": "^4.9.0"
   }
 }
diff --git a/src/__tests__/wait-positionals.test.ts b/packages/command-registry/src/wait-positionals.test.ts
similarity index 98%
rename from src/__tests__/wait-positionals.test.ts
rename to packages/command-registry/src/wait-positionals.test.ts
index 7b03c23b3d..b5af3f1c6f 100644
--- a/src/__tests__/wait-positionals.test.ts
+++ b/packages/command-registry/src/wait-positionals.test.ts
@@ -10,10 +10,7 @@ import fc from 'fast-check';
 import { test } from 'vitest';
 import { isValidSelectorExpression, SELECTOR_KEY_NAMES } from '@agent-device/selectors';
 import { PROPERTY_RUNS } from '@agent-device/selectors/snapshot-geometry-fixtures';
-import {
-  parseWaitPositionals,
-  resolveWaitBudgetMs,
-} from '@agent-device/command-registry/wait-positionals';
+import { parseWaitPositionals, resolveWaitBudgetMs } from './wait-positionals.ts';
 
 function assertInvalid(args: string[], messageFragment: string) {
   const result = parseWaitPositionals(args);
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 9dea7d0e86..20993cbdd1 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -272,6 +272,10 @@ importers:
       '@agent-device/selectors':
         specifier: workspace:*
         version: link:../selectors
+    devDependencies:
+      fast-check:
+        specifier: ^4.9.0
+        version: 4.9.0
 
   packages/contracts:
     dependencies: