diff --git a/test/scripts/docker-build-helper.test.ts b/test/scripts/docker-build-helper.test.ts
index 26570e62197..e9792a68a96 100644
--- a/test/scripts/docker-build-helper.test.ts
+++ b/test/scripts/docker-build-helper.test.ts
@@ -23,6 +23,7 @@ const PLUGINS_DOCKER_E2E_PATH = "scripts/e2e/plugins-docker.sh";
 const PLUGINS_DOCKER_SWEEP_PATH = "scripts/e2e/lib/plugins/sweep.sh";
 const PLUGINS_DOCKER_MARKETPLACE_PATH = "scripts/e2e/lib/plugins/marketplace.sh";
 const PLUGINS_DOCKER_CLAWHUB_PATH = "scripts/e2e/lib/plugins/clawhub.sh";
+const PLUGINS_DOCKER_ASSERTIONS_PATH = "scripts/e2e/lib/plugins/assertions.mjs";
 const PLUGIN_UPDATE_DOCKER_E2E_PATH = "scripts/e2e/plugin-update-unchanged-docker.sh";
 const PLUGIN_UPDATE_SCENARIO_PATH = "scripts/e2e/lib/plugin-update/unchanged-scenario.sh";
 const PLUGIN_UPDATE_PROBE_PATH = "scripts/e2e/lib/plugin-update/probe.mjs";
@@ -140,6 +141,7 @@ describe("docker build helper", () => {
     const pluginsSweep = readFileSync(PLUGINS_DOCKER_SWEEP_PATH, "utf8");
     const pluginsMarketplace = readFileSync(PLUGINS_DOCKER_MARKETPLACE_PATH, "utf8");
     const pluginsClawhub = readFileSync(PLUGINS_DOCKER_CLAWHUB_PATH, "utf8");
+    const pluginsAssertions = readFileSync(PLUGINS_DOCKER_ASSERTIONS_PATH, "utf8");
     const pluginUpdateScenario = readFileSync(PLUGIN_UPDATE_SCENARIO_PATH, "utf8");
     const pluginUpdateProbe = readFileSync(PLUGIN_UPDATE_PROBE_PATH, "utf8");
     const packageCompat = readFileSync(PACKAGE_COMPAT_PATH, "utf8");
@@ -171,9 +173,7 @@ describe("docker build helper", () => {
       "Package $package_version must support gateway install --wrapper.",
     );
     expect(scripts.join("\n")).toContain("expected persisted update.channel dev");
-    expect(scripts.join("\n")).toContain(
-      "expected modern installRecords in installed plugin index",
-    );
+    expect(pluginsAssertions).toContain("expected modern installRecords in installed plugin index");
   });
 
   it("keeps bundled plugin install/uninstall sweep chunkable", () => {
diff --git a/test/scripts/plugin-prerelease-test-plan.test.ts b/test/scripts/plugin-prerelease-test-plan.test.ts
index c45e9d431ab..771b760b8b4 100644
--- a/test/scripts/plugin-prerelease-test-plan.test.ts
+++ b/test/scripts/plugin-prerelease-test-plan.test.ts
@@ -88,6 +88,10 @@ describe("scripts/lib/plugin-prerelease-test-plan.mjs", () => {
     const lane = findLaneByName("kitchen-sink-plugin");
     const script = readFileSync("scripts/e2e/kitchen-sink-plugin-docker.sh", "utf8");
     const sweepScript = readFileSync("scripts/e2e/lib/kitchen-sink-plugin/sweep.sh", "utf8");
+    const assertionsScript = readFileSync(
+      "scripts/e2e/lib/kitchen-sink-plugin/assertions.mjs",
+      "utf8",
+    );
 
     expect(lane).toEqual(
       expect.objectContaining({
@@ -106,9 +110,9 @@ describe("scripts/lib/plugin-prerelease-test-plan.mjs", () => {
     expect(sweepScript).toContain('plugins install "$KITCHEN_SINK_SPEC"');
     expect(sweepScript).toContain('plugins uninstall "$KITCHEN_SINK_SPEC" --force');
     expect(sweepScript).toContain("run_failure_scenario");
-    expect(sweepScript).toContain("record.source !== source");
-    expect(sweepScript).toContain("record.clawhubPackage !== packageName");
-    expect(sweepScript).toContain("expectedErrorMessages");
+    expect(assertionsScript).toContain("record.source !== source");
+    expect(assertionsScript).toContain("record.clawhubPackage !== packageName");
+    expect(assertionsScript).toContain("expectedErrorMessages");
     expect(script).toContain("docker stats --no-stream");
     expect(sweepScript).toContain("scan_logs_for_unexpected_errors");
   });