diff --git a/package.json b/package.json
index 520a265e..093337f0 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "@oclif/plugin-command-snapshot": "^5.0.4",
-    "@salesforce/cli-plugins-testkit": "^5.0.6",
+    "@salesforce/cli-plugins-testkit": "^5.1.1",
     "@salesforce/dev-scripts": "^8.1.2",
     "@salesforce/plugin-command-reference": "^3.0.51",
     "@types/inquirer": "^8.2.0",
diff --git a/test/nuts/field.nut.ts b/test/nuts/field.nut.ts
index f98e7cf8..02da1151 100644
--- a/test/nuts/field.nut.ts
+++ b/test/nuts/field.nut.ts
@@ -5,7 +5,7 @@
  * For full license text, see LICENSE.txt file in the repo root or https://opensource.org/licenses/BSD-3-Clause
  */
 
-import path  from 'node:path';
+import path from 'node:path';
 import { execCmd, TestSession } from '@salesforce/cli-plugins-testkit';
 
 describe('generate field NUTs', () => {
@@ -31,7 +31,7 @@ describe('generate field NUTs', () => {
   describe('flag validation failures', () => {
     it('short label', () => {
       const command = 'generate metadata field --label yo';
-      execCmd(command, { ensureExitCode: 1 });
+      execCmd(command, { ensureExitCode: 'nonZero' });
     });
     it('bad object dir', () => {
       const command = `generate metadata field --label longEnough --object ${path.join(
@@ -40,7 +40,7 @@ describe('generate field NUTs', () => {
         'default',
         'tabs'
       )}`;
-      execCmd(command, { ensureExitCode: 1 });
+      execCmd(command, { ensureExitCode: 'nonZero' });
     });
   });
 });
diff --git a/test/nuts/platformevent.nut.ts b/test/nuts/platformevent.nut.ts
index 2c4378a5..99462e8b 100644
--- a/test/nuts/platformevent.nut.ts
+++ b/test/nuts/platformevent.nut.ts
@@ -30,7 +30,7 @@ describe('generate platformevent NUTs', () => {
   describe('flag validation failures', () => {
     it('short label', () => {
       const command = 'generate metadata platformevent --label yo';
-      execCmd(command, { ensureExitCode: 1 });
+      execCmd(command, { ensureExitCode: 'nonZero' });
     });
   });
 });
diff --git a/test/nuts/sobject.nut.ts b/test/nuts/sobject.nut.ts
index 217a2edc..cee99282 100644
--- a/test/nuts/sobject.nut.ts
+++ b/test/nuts/sobject.nut.ts
@@ -26,7 +26,7 @@ describe('generate sobject NUTs', () => {
   describe('flag validation failures', () => {
     it('short label', () => {
       const command = 'generate metadata sobject --label yo';
-      execCmd(command, { ensureExitCode: 1 });
+      execCmd(command, { ensureExitCode: 'nonZero' });
     });
   });
 });
diff --git a/test/nuts/tab.nut.ts b/test/nuts/tab.nut.ts
index 5c3e4955..728bac63 100644
--- a/test/nuts/tab.nut.ts
+++ b/test/nuts/tab.nut.ts
@@ -5,7 +5,7 @@
  * For full license text, see LICENSE.txt file in the repo root or https://opensource.org/licenses/BSD-3-Clause
  */
 
-import path  from 'node:path';
+import path from 'node:path';
 import { execCmd, TestSession } from '@salesforce/cli-plugins-testkit';
 
 describe('generate tab NUTs', () => {
@@ -35,7 +35,7 @@ describe('generate tab NUTs', () => {
         'default',
         'objects'
       )}`;
-      execCmd(command, { ensureExitCode: 1 });
+      execCmd(command, { ensureExitCode: 'nonZero' });
     });
   });
 });
diff --git a/yarn.lock b/yarn.lock
index 8255fccf..aca9f7c0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -949,12 +949,12 @@
   resolved "https://registry.yarnpkg.com/@pkgjs/parseargs/-/parseargs-0.11.0.tgz#a77ea742fab25775145434eb1d2328cf5013ac33"
   integrity sha512-+1VkjdD0QBLPodGrJUeqarH8VAIvQODIbwh9XpP5Syisf7YoQgsJKPNFoqqLQlu+VQ/tVSshMR6loPMn8U+dPg==
 
-"@salesforce/cli-plugins-testkit@^5.0.6":
-  version "5.0.6"
-  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.0.6.tgz#16fb3378406b19ba7b70ebec58c27d683141c571"
-  integrity sha512-1zbyVpATCSgcL8X6svic2MNqIGGJLUQAwkLmTiibwiudnKGZhkXj1kF+46c2mr5oi4hLKk7Bpzq2fO45MT14/A==
+"@salesforce/cli-plugins-testkit@^5.1.1":
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.1.1.tgz#73baef2d27abc6cbb11c82e2869a3b4b57ff342d"
+  integrity sha512-qllBs+dGYIMS7GrJfJaalJSNsNohDAiLLHOZXk8WL+aZ1dRGDaWTiS4gyZKPKgeahXuNPTBxDqNg7WajvfNcxg==
   dependencies:
-    "@salesforce/core" "^6.2.2"
+    "@salesforce/core" "^6.4.0"
     "@salesforce/kit" "^3.0.15"
     "@salesforce/ts-types" "^2.0.9"
     "@types/shelljs" "^0.8.15"