diff --git a/internal/certauthority/certauthority_test.go b/internal/certauthority/certauthority_test.go
index 80948a77..016268be 100644
--- a/internal/certauthority/certauthority_test.go
+++ b/internal/certauthority/certauthority_test.go
@@ -261,7 +261,7 @@ func TestIssue(t *testing.T) {
 					clock:     func() time.Time { return now },
 				},
 			},
-			wantErr: "could not parse CA certificate: asn1: syntax error: sequence truncated",
+			wantErr: "could not parse CA certificate: x509: malformed certificate",
 		},
 		{
 			name: "signing error",
diff --git a/internal/oidc/token/token_handler_test.go b/internal/oidc/token/token_handler_test.go
index bca9a3ce..9032dd10 100644
--- a/internal/oidc/token/token_handler_test.go
+++ b/internal/oidc/token/token_handler_test.go
@@ -103,7 +103,7 @@ var (
 	fositeInvalidPayloadErrorBody = here.Doc(`
 		{
 			"error":             "invalid_request",
-			"error_description": "The request is missing a required parameter, includes an invalid parameter value, includes a parameter more than once, or is otherwise malformed. Unable to parse HTTP body, make sure to send a properly formatted form request body."
+			"error_description": "The request is missing a required parameter, includes an invalid parameter value, includes a parameter more than once, or is otherwise malformed. The POST body can not be empty."
 		}
 	`)