diff --git a/package.json b/package.json
index 0fed12dc..d4ccfabf 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
   },
   "devDependencies": {
     "@oclif/plugin-command-snapshot": "^5.0.2",
-    "@salesforce/cli-plugins-testkit": "^5.0.6",
+    "@salesforce/cli-plugins-testkit": "^5.1.0",
     "@salesforce/dev-scripts": "^7.1.1",
     "@salesforce/plugin-command-reference": "^3.0.48",
     "eslint-plugin-sf-plugin": "^1.16.15",
diff --git a/test/nuts/local/createCMDT.nut.ts b/test/nuts/local/createCMDT.nut.ts
index f1fcbf50..f4c4f8b9 100644
--- a/test/nuts/local/createCMDT.nut.ts
+++ b/test/nuts/local/createCMDT.nut.ts
@@ -92,7 +92,7 @@ describe('force:cmdt:create', () => {
     });
 
     it('runs force:cmdt:create --typename MyC__MDT --visibility "Invalid"', () => {
-      const result = execCmd('force:cmdt:create --typename MyC --visibility Invalid', { ensureExitCode: 1 });
+      const result = execCmd('force:cmdt:create --typename MyC --visibility Invalid', { ensureExitCode: 'nonZero' });
       expect(result.shellOutput.stderr).to.contain(
         'Expected --visibility=Invalid to be one of: PackageProtected, Protected, Public'
       );
diff --git a/test/nuts/local/createField.nut.ts b/test/nuts/local/createField.nut.ts
index 10b6abbb..e059f0b9 100644
--- a/test/nuts/local/createField.nut.ts
+++ b/test/nuts/local/createField.nut.ts
@@ -64,20 +64,22 @@ describe('force:cmdt:field:create', () => {
 
   describe('failures', () => {
     it('fails running force:cmdt:field:create --fieldname myFi__eld --fieldtype Text', () => {
-      const result = execCmd('force:cmdt:field:create --fieldname myFi__eld --fieldtype Text', { ensureExitCode: 1 });
+      const result = execCmd('force:cmdt:field:create --fieldname myFi__eld --fieldtype Text', {
+        ensureExitCode: 'nonZero',
+      });
       expect(result.shellOutput.stderr).to.contain(messages.getMessage('invalidCustomFieldError', ['myFi__eld']));
     });
 
     it('fails running force:cmdt:field:create --fieldname myField --fieldtype Picklist', () => {
       const result = execCmd('force:cmdt:field:create --fieldname myField --fieldtype Picklist', {
-        ensureExitCode: 1,
+        ensureExitCode: 'nonZero',
       });
       expect(result.shellOutput.stderr).to.contain(messages.getMessage('picklistValuesNotSuppliedError'));
     });
 
     it('fails running force:cmdt:field:create --fieldname money --fieldtype Currency', () => {
       const result = execCmd('force:cmdt:field:create --fieldname money --fieldtype Currency', {
-        ensureExitCode: 1,
+        ensureExitCode: 'nonZero',
       });
       expect(result.shellOutput.stderr).to.contain(
         'Expected --type=Currency to be one of: Checkbox, Date, DateTime, Email, Number, Percent, Phone, Picklist, Text, TextArea, LongTextArea, Url'
diff --git a/yarn.lock b/yarn.lock
index 572007ff..f7efc51a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -891,10 +891,10 @@
   dependencies:
     "@octokit/openapi-types" "^12.11.0"
 
-"@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@^5.1.0":
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.1.0.tgz#8d9caa22ea9e99879629206892afb26bcd540cef"
+  integrity sha512-P5tYlNqE87lX9Yp2aAsK75PICoAbmrSK3LEqiIVbtn75PN3OKiD1JEEX2ZDu+HWtO4/nxPtO4JFvX5j00EZGBA==
   dependencies:
     "@salesforce/core" "^6.2.2"
     "@salesforce/kit" "^3.0.15"