diff --git a/extensions/qa-lab/src/auth-profile-fixture.ts b/extensions/qa-lab/src/auth-profile.fixture.ts
similarity index 100%
rename from extensions/qa-lab/src/auth-profile-fixture.ts
rename to extensions/qa-lab/src/auth-profile.fixture.ts
diff --git a/extensions/qa-lab/src/codex-plugin-lifecycle.test.ts b/extensions/qa-lab/src/codex-plugin-lifecycle.test.ts
index 20cd8b9bf27..63a9addbdac 100644
--- a/extensions/qa-lab/src/codex-plugin-lifecycle.test.ts
+++ b/extensions/qa-lab/src/codex-plugin-lifecycle.test.ts
@@ -7,7 +7,7 @@ import {
   resolveCodexAuthProfile,
   seedAuthProfiles,
   snapshotAuthProfiles,
-} from "./auth-profile-fixture.js";
+} from "./auth-profile.fixture.js";
 import {
   CODEX_PLUGIN_CURRENT_VERSION,
   CODEX_PLUGIN_LIFECYCLE_MESSAGES,
@@ -15,7 +15,7 @@ import {
   evaluateCodexPluginLifecycle,
   seedCodexPluginAt,
   snapshotCodexPluginState,
-} from "./codex-plugin-fixture.js";
+} from "./codex-plugin.fixture.js";
 import { createTempDirHarness } from "./temp-dir.test-helper.js";
 
 const tempDirs = createTempDirHarness();
diff --git a/extensions/qa-lab/src/codex-plugin-fixture.ts b/extensions/qa-lab/src/codex-plugin.fixture.ts
similarity index 99%
rename from extensions/qa-lab/src/codex-plugin-fixture.ts
rename to extensions/qa-lab/src/codex-plugin.fixture.ts
index a286f5bcf4c..f6e072f6550 100644
--- a/extensions/qa-lab/src/codex-plugin-fixture.ts
+++ b/extensions/qa-lab/src/codex-plugin.fixture.ts
@@ -1,6 +1,6 @@
 import fs from "node:fs/promises";
 import path from "node:path";
-import { resolveCodexAuthProfile, type QaAuthProfileSnapshot } from "./auth-profile-fixture.js";
+import { resolveCodexAuthProfile, type QaAuthProfileSnapshot } from "./auth-profile.fixture.js";
 
 export const CODEX_PLUGIN_CURRENT_VERSION = "2026.5.20";
 export const CODEX_PLUGIN_HEAD_VERSION = "head";
diff --git a/qa/scenarios/runtime/auth-profile-codex-mixed-profiles.md b/qa/scenarios/runtime/auth-profile-codex-mixed-profiles.md
index fb160a0be66..3adebe2cddd 100644
--- a/qa/scenarios/runtime/auth-profile-codex-mixed-profiles.md
+++ b/qa/scenarios/runtime/auth-profile-codex-mixed-profiles.md
@@ -18,7 +18,7 @@ successCriteria:
 docsRefs:
   - docs/cli/doctor.md
 codeRefs:
-  - extensions/qa-lab/src/auth-profile-fixture.ts
+  - extensions/qa-lab/src/auth-profile.fixture.ts
   - extensions/qa-lab/src/codex-plugin-lifecycle.test.ts
 execution:
   kind: flow
@@ -34,7 +34,7 @@ steps:
     actions:
       - set: auth
         value:
-          expr: await qaImport("./auth-profile-fixture.js")
+          expr: await qaImport("./auth-profile.fixture.js")
       - set: tmpRoot
         value:
           expr: await fs.mkdtemp(path.join(env.gateway?.workspaceDir ?? "/tmp", "qa-codex-auth-"))
diff --git a/qa/scenarios/runtime/auth-profile-doctor-migration-safety.md b/qa/scenarios/runtime/auth-profile-doctor-migration-safety.md
index cf4f5ae83f0..78a2c56dbc9 100644
--- a/qa/scenarios/runtime/auth-profile-doctor-migration-safety.md
+++ b/qa/scenarios/runtime/auth-profile-doctor-migration-safety.md
@@ -19,8 +19,8 @@ successCriteria:
 docsRefs:
   - docs/cli/doctor.md
 codeRefs:
-  - extensions/qa-lab/src/auth-profile-fixture.ts
-  - extensions/qa-lab/src/codex-plugin-fixture.ts
+  - extensions/qa-lab/src/auth-profile.fixture.ts
+  - extensions/qa-lab/src/codex-plugin.fixture.ts
   - extensions/qa-lab/src/codex-plugin-lifecycle.test.ts
 execution:
   kind: flow
@@ -39,10 +39,10 @@ steps:
     actions:
       - set: auth
         value:
-          expr: await qaImport("./auth-profile-fixture.js")
+          expr: await qaImport("./auth-profile.fixture.js")
       - set: plugin
         value:
-          expr: await qaImport("./codex-plugin-fixture.js")
+          expr: await qaImport("./codex-plugin.fixture.js")
       - forEach:
           items:
             ref: config.matrixCells
diff --git a/qa/scenarios/runtime/codex-plugin-cold-install.md b/qa/scenarios/runtime/codex-plugin-cold-install.md
index f4820c6b117..7b8b602b123 100644
--- a/qa/scenarios/runtime/codex-plugin-cold-install.md
+++ b/qa/scenarios/runtime/codex-plugin-cold-install.md
@@ -20,8 +20,8 @@ docsRefs:
   - docs/cli/plugins.md
   - docs/plugins/install-overrides.md
 codeRefs:
-  - extensions/qa-lab/src/codex-plugin-fixture.ts
-  - extensions/qa-lab/src/auth-profile-fixture.ts
+  - extensions/qa-lab/src/codex-plugin.fixture.ts
+  - extensions/qa-lab/src/auth-profile.fixture.ts
   - extensions/qa-lab/src/codex-plugin-lifecycle.test.ts
 execution:
   kind: flow
@@ -36,10 +36,10 @@ steps:
     actions:
       - set: auth
         value:
-          expr: await qaImport("./auth-profile-fixture.js")
+          expr: await qaImport("./auth-profile.fixture.js")
       - set: plugin
         value:
-          expr: await qaImport("./codex-plugin-fixture.js")
+          expr: await qaImport("./codex-plugin.fixture.js")
       - set: tmpRoot
         value:
           expr: await fs.mkdtemp(path.join(env.gateway?.workspaceDir ?? "/tmp", "qa-codex-cold-"))
diff --git a/qa/scenarios/runtime/codex-plugin-install-race.md b/qa/scenarios/runtime/codex-plugin-install-race.md
index d8eaeda9cf0..8185bdc3a91 100644
--- a/qa/scenarios/runtime/codex-plugin-install-race.md
+++ b/qa/scenarios/runtime/codex-plugin-install-race.md
@@ -18,7 +18,7 @@ successCriteria:
 docsRefs:
   - docs/cli/plugins.md
 codeRefs:
-  - extensions/qa-lab/src/codex-plugin-fixture.ts
+  - extensions/qa-lab/src/codex-plugin.fixture.ts
   - extensions/qa-lab/src/codex-plugin-lifecycle.test.ts
 execution:
   kind: flow
@@ -34,7 +34,7 @@ steps:
     actions:
       - set: plugin
         value:
-          expr: await qaImport("./codex-plugin-fixture.js")
+          expr: await qaImport("./codex-plugin.fixture.js")
       - set: gate
         value:
           expr: plugin.createCodexPluginInstallGate()
diff --git a/qa/scenarios/runtime/codex-plugin-pinned-new.md b/qa/scenarios/runtime/codex-plugin-pinned-new.md
index a9c162013c2..706b87b87b8 100644
--- a/qa/scenarios/runtime/codex-plugin-pinned-new.md
+++ b/qa/scenarios/runtime/codex-plugin-pinned-new.md
@@ -17,7 +17,7 @@ docsRefs:
   - docs/cli/plugins.md
   - docs/cli/update.md
 codeRefs:
-  - extensions/qa-lab/src/codex-plugin-fixture.ts
+  - extensions/qa-lab/src/codex-plugin.fixture.ts
   - extensions/qa-lab/src/codex-plugin-lifecycle.test.ts
 execution:
   kind: flow
@@ -35,10 +35,10 @@ steps:
     actions:
       - set: auth
         value:
-          expr: await qaImport("./auth-profile-fixture.js")
+          expr: await qaImport("./auth-profile.fixture.js")
       - set: plugin
         value:
-          expr: await qaImport("./codex-plugin-fixture.js")
+          expr: await qaImport("./codex-plugin.fixture.js")
       - set: tmpRoot
         value:
           expr: await fs.mkdtemp(path.join(env.gateway?.workspaceDir ?? "/tmp", "qa-codex-new-"))
diff --git a/qa/scenarios/runtime/codex-plugin-pinned-old.md b/qa/scenarios/runtime/codex-plugin-pinned-old.md
index 261a9794efe..7c814e61a72 100644
--- a/qa/scenarios/runtime/codex-plugin-pinned-old.md
+++ b/qa/scenarios/runtime/codex-plugin-pinned-old.md
@@ -17,7 +17,7 @@ docsRefs:
   - docs/cli/plugins.md
   - docs/cli/update.md
 codeRefs:
-  - extensions/qa-lab/src/codex-plugin-fixture.ts
+  - extensions/qa-lab/src/codex-plugin.fixture.ts
   - extensions/qa-lab/src/codex-plugin-lifecycle.test.ts
 execution:
   kind: flow
@@ -35,10 +35,10 @@ steps:
     actions:
       - set: auth
         value:
-          expr: await qaImport("./auth-profile-fixture.js")
+          expr: await qaImport("./auth-profile.fixture.js")
       - set: plugin
         value:
-          expr: await qaImport("./codex-plugin-fixture.js")
+          expr: await qaImport("./codex-plugin.fixture.js")
       - set: tmpRoot
         value:
           expr: await fs.mkdtemp(path.join(env.gateway?.workspaceDir ?? "/tmp", "qa-codex-old-"))