diff --git a/packages/cli/src/lib/versioning/Lockfile.test.ts b/packages/cli/src/lib/versioning/Lockfile.test.ts
index 7b0da9ce8c..30c6f6ffee 100644
--- a/packages/cli/src/lib/versioning/Lockfile.test.ts
+++ b/packages/cli/src/lib/versioning/Lockfile.test.ts
@@ -19,12 +19,20 @@ import mockFs from 'mock-fs';
 import { ExtendedPackage } from '../monorepo';
 import { Lockfile } from './Lockfile';
 
-const HEADER = `# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+const LEGACY_HEADER = `# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
 # yarn lockfile v1
 
 `;
 
-const mockA = `${HEADER}
+const MODERN_HEADER = `# This file is generated by running "yarn install" inside your project.
+# Manual changes might be lost - proceed with caution!
+
+__metadata:
+  version: 6
+  cacheKey: 8
+`;
+
+const mockA = `${LEGACY_HEADER}
 a@^1:
   version "1.0.1"
   resolved "https://my-registry/a-1.0.01.tgz#abc123"
@@ -39,7 +47,7 @@ b@^2:
   version "2.0.0"
 `;
 
-const mockADedup = `${HEADER}
+const mockADedup = `${LEGACY_HEADER}
 a@^1:
   version "1.0.1"
   resolved "https://my-registry/a-1.0.01.tgz#abc123"
@@ -51,7 +59,7 @@ b@2.0.x, b@^2:
   version "2.0.1"
 `;
 
-const mockB = `${HEADER}
+const mockB = `${LEGACY_HEADER}
 "@s/a@*", "@s/a@1 || 2", "@s/a@^1":
   version "1.0.1"
 
@@ -59,7 +67,7 @@ const mockB = `${HEADER}
   version "2.0.0"
 `;
 
-const mockBDedup = `${HEADER}
+const mockBDedup = `${LEGACY_HEADER}
 "@s/a@*", "@s/a@1 || 2", "@s/a@^2.0.x":
   version "2.0.0"
 
@@ -157,15 +165,7 @@ describe('Lockfile', () => {
   });
 });
 
-const newHeader = `# This file is generated by running "yarn install" inside your project.
-# Manual changes might be lost - proceed with caution!
-
-__metadata:
-  version: 6
-  cacheKey: 8
-`;
-
-const mockANew = `${newHeader}
+const mockANew = `${MODERN_HEADER}
 a@^1:
   version: 1.0.1
   dependencies:
@@ -180,7 +180,7 @@ b@^2:
   version: 2.0.0
 `;
 
-const mockANewDedup = `${newHeader}
+const mockANewDedup = `${MODERN_HEADER}
 a@^1:
   version: 1.0.1
   dependencies:
@@ -321,7 +321,7 @@ describe('New Lockfile', () => {
   });
 
   describe('diff', () => {
-    const lockfileLegacyA = Lockfile.parse(`${HEADER}
+    const lockfileLegacyA = Lockfile.parse(`${LEGACY_HEADER}
 a@^1:
   version "1.0.1"
   resolved "https://my-registry/a-1.0.01.tgz#abc123"
@@ -346,7 +346,7 @@ c@^1:
   integrity x
 `);
 
-    const lockfileLegacyB = Lockfile.parse(`${HEADER}
+    const lockfileLegacyB = Lockfile.parse(`${LEGACY_HEADER}
 a@^1:
   version "1.0.1"
   resolved "https://my-registry/a-1.0.01.tgz#abc123"
@@ -367,50 +367,50 @@ d@^1:
   integrity x
 `);
 
-    const lockfileModernA = Lockfile.parse(`${HEADER}
-"a@^1":
-  version "1.0.1"
-  resolved "https://my-registry/a-1.0.01.tgz#abc123"
-  checksum sha512-xyz
+    const lockfileModernA = Lockfile.parse(`${MODERN_HEADER}
+"a@npm:^1":
+  version: "1.0.1"
+  resolved: "https://my-registry/a-1.0.01.tgz#abc123"
+  checksum: sha512-xyz
   dependencies:
-    b "^2"
+    b: "^2"
 
-"b@3":
-  version "3.0.1"
-  checksum sha512-abc1
+"b@npm:3":
+  version: "3.0.1"
+  checksum: sha512-abc1
 
-"b@2.0.x":
-  version "2.0.1"
-  checksum sha512-abc2
+"b@npm:2.0.x":
+  version: "2.0.1"
+  checksum: sha512-abc2
 
-"b@^2":
-  version "2.0.0"
-  checksum sha512-abc3
+"b@npm:^2":
+  version: "2.0.0"
+  checksum: sha512-abc3
 
-"c@^1":
-  version "1.0.1"
-  checksum x
+"c@npm:^1":
+  version: "1.0.1"
+  checksum: x
 `);
 
-    const lockfileModernB = Lockfile.parse(`${HEADER}
-"a@^1":
-  version "1.0.1"
-  resolution "a@npm:1.0.1"
-  checksum sha512-xyz-other
+    const lockfileModernB = Lockfile.parse(`${MODERN_HEADER}
+"a@npm:^1":
+  version: "1.0.1"
+  resolution: "a@npm:1.0.1"
+  checksum: sha512-xyz-other
   dependencies:
-    b "^2"
+    b: "^2"
 
-"b@2.0.x, b@^2":
-  version "2.0.0"
-  checksum sha512-abc3
+"b@npm:2.0.x, b@npm:^2":
+  version: "2.0.0"
+  checksum: sha512-abc3
 
-"b@4":
-  version "4.0.0"
-  checksum sha512-abc
+"b@npm:4":
+  version: "4.0.0"
+  checksum: sha512-abc
 
-"d@^1":
-  version "1.0.1"
-  checksum x
+"d@npm:^1":
+  version: "1.0.1"
+  checksum: x
 `);
 
     it('should diff two legacy lockfiles', async () => {
@@ -538,7 +538,7 @@ d@^1:
     });
 
     it('should handle workspace ranges', async () => {
-      const lockfile = `${HEADER}
+      const lockfile = `${MODERN_HEADER}
 "@backstage/app-defaults@workspace:^, @backstage/app-defaults@workspace:packages/app-defaults":
   version: 0.0.0-use.local
   resolution: "@backstage/app-defaults@workspace:packages/app-defaults"