return kubernetesReleaseVersion(body, fetcher)
		}

		// both the client and the remote version are obtained; validate them and pick a stable version
		body, err = validateStableVersion(body, clientVersion)
		if err != nil {
			return "", err
		}
		// Re-validate received version and return.
		return kubernetesReleaseVersion(body, fetcher)
	}

			remoteVersion: "v1.12.0",
			clientVersion: "invalid-version",
			expectedError: true,
		},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			output, err := validateStableVersion(tc.remoteVersion, tc.clientVersion)
			if (err != nil) != tc.expectedError {
				t.Fatalf("expected error: %v, got: %v", tc.expectedError, err != nil)
			}
			if output != tc.output {