@@ -227,7 +227,7 @@ func (s *DockerTrustSuite) TestTrustedPushWithIncorrectPassphraseForNonRoot(c *c

 	s.trustedCmdWithPassphrases(pushCmd, "12345678", "87654321")

 	out, _, err = runCommandWithOutput(pushCmd)

 	c.Assert(err, check.NotNil, check.Commentf("Error missing from trusted push with short targets passphrase: \n%s", out))

-	c.Assert(out, checker.Contains, "password invalid, operation has failed", check.Commentf("Missing expected output on trusted push with short targets/snapsnot passphrase"))

+	c.Assert(out, checker.Contains, "could not find necessary signing keys", check.Commentf("Missing expected output on trusted push with short targets/snapsnot passphrase"))

 }

 // This test ensures backwards compatibility with old ENV variables. Should be

@@ -249,7 +249,7 @@ func (s *DockerTrustSuite) TestTrustedPushWithIncorrectDeprecatedPassphraseForNo

 	s.trustedCmdWithDeprecatedEnvPassphrases(pushCmd, "12345678", "87654321")

 	out, _, err = runCommandWithOutput(pushCmd)

 	c.Assert(err, check.NotNil, check.Commentf("Error missing from trusted push with short targets passphrase: \n%s", out))

-	c.Assert(out, checker.Contains, "password invalid, operation has failed", check.Commentf("Missing expected output on trusted push with short targets/snapsnot passphrase"))

+	c.Assert(out, checker.Contains, "could not find necessary signing keys", check.Commentf("Missing expected output on trusted push with short targets/snapsnot passphrase"))

 }

 func (s *DockerTrustSuite) TestTrustedPushWithExpiredSnapshot(c *check.C) {