diff --git a/plugins/github-release-manager/src/helpers/tagParts/getTagParts.test.ts b/plugins/github-release-manager/src/helpers/tagParts/getTagParts.test.ts
index 91a753dbe3..fc1ab1479b 100644
--- a/plugins/github-release-manager/src/helpers/tagParts/getTagParts.test.ts
+++ b/plugins/github-release-manager/src/helpers/tagParts/getTagParts.test.ts
@@ -18,104 +18,34 @@ import {
   mockCalverProject,
   mockSemverProject,
 } from '../../test-helpers/test-helpers';
+
+jest.mock('./getCalverTagParts', () => ({
+  getCalverTagParts: jest.fn(),
+}));
+jest.mock('./getSemverTagParts', () => ({
+  getSemverTagParts: jest.fn(),
+}));
+
+import { getCalverTagParts } from './getCalverTagParts';
+import { getSemverTagParts } from './getSemverTagParts';
 import { getTagParts } from './getTagParts';
 
 describe('getTagParts', () => {
+  beforeEach(jest.resetAllMocks);
+
   describe('calver', () => {
-    it('should return tagParts for RC tag', () =>
-      expect(
-        getTagParts({ project: mockCalverProject, tag: 'rc-2020.01.01_1' }),
-      ).toMatchInlineSnapshot(`
-        Object {
-          "calver": "2020.01.01",
-          "patch": 1,
-          "prefix": "rc",
-        }
-      `));
+    it('should call getCalverTagParts for calver projects', () => {
+      getTagParts({ project: mockCalverProject, tag: 'banana' });
 
-    it('should return tagParts for Version tag', () =>
-      expect(
-        getTagParts({
-          project: mockCalverProject,
-          tag: 'version-2020.01.01_1',
-        }),
-      ).toMatchInlineSnapshot(`
-        Object {
-          "calver": "2020.01.01",
-          "patch": 1,
-          "prefix": "version",
-        }
-      `));
-
-    it('should return null for invalid prefix', () => {
-      expect(() =>
-        getTagParts({
-          project: mockCalverProject,
-          tag: 'invalid-2020.01.01_1',
-        }),
-      ).toThrowErrorMatchingInlineSnapshot(`"Invalid calver tag"`);
-    });
-
-    it('should return null for invalid calver (missing padded zero)', () => {
-      expect(() =>
-        getTagParts({ project: mockCalverProject, tag: 'rc-2020.1.01_1' }),
-      ).toThrowErrorMatchingInlineSnapshot(`"Invalid calver tag"`);
-    });
-
-    it('should return null for invalid calver (missing day)', () => {
-      expect(() =>
-        getTagParts({ project: mockCalverProject, tag: 'rc-2020.01_1' }),
-      ).toThrowErrorMatchingInlineSnapshot(`"Invalid calver tag"`);
-    });
-
-    it('should return null for invalid patch (letter instead of number)', () => {
-      expect(() =>
-        getTagParts({ project: mockCalverProject, tag: 'rc-2020.01.01_a' }),
-      ).toThrowErrorMatchingInlineSnapshot(`"Invalid calver tag"`);
+      expect(getCalverTagParts).toHaveBeenCalledTimes(1);
     });
   });
 
   describe('semver', () => {
-    it('should return tagParts for RC tag', () =>
-      expect(getTagParts({ project: mockSemverProject, tag: 'rc-1.2.3' }))
-        .toMatchInlineSnapshot(`
-        Object {
-          "major": 1,
-          "minor": 2,
-          "patch": 3,
-          "prefix": "rc",
-        }
-      `));
+    it('should call getSemverTagParts for calver projects', () => {
+      getTagParts({ project: mockSemverProject, tag: 'banana' });
 
-    it('should return tagParts for Version tag', () =>
-      expect(getTagParts({ project: mockSemverProject, tag: 'version-1.2.3' }))
-        .toMatchInlineSnapshot(`
-        Object {
-          "major": 1,
-          "minor": 2,
-          "patch": 3,
-          "prefix": "version",
-        }
-      `));
-
-    it('should throw for invalid prefix', () => {
-      expect(() =>
-        getTagParts({ project: mockSemverProject, tag: 'invalid-1.2.3' }),
-      ).toThrowErrorMatchingInlineSnapshot(`"Invalid semver tag"`);
-    });
-
-    it('should throw for invalid semver (missing patch)', () => {
-      expect(() =>
-        getTagParts({ project: mockSemverProject, tag: 'rc-1.2' }),
-      ).toThrowErrorMatchingInlineSnapshot(`"Invalid semver tag"`);
-    });
-
-    it('should throw for invalid semver (founds calver)', () => {
-      expect(() =>
-        getTagParts({ project: mockSemverProject, tag: 'rc-1337.01.01_1' }),
-      ).toThrowErrorMatchingInlineSnapshot(
-        `"Invalid semver tag, found calver"`,
-      );
+      expect(getSemverTagParts).toHaveBeenCalledTimes(1);
     });
   });
 });