diff --git a/Cargo.lock b/Cargo.lock
index 917de7f6..80ec74f1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1184,37 +1184,14 @@ dependencies = [
  "cipher 0.3.0",
 ]
 
-[[package]]
-name = "darling"
-version = "0.13.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a01d95850c592940db9b8194bc39f4bc0e89dee5c4265e4b1807c34a9aba453c"
-dependencies = [
- "darling_core 0.13.4",
- "darling_macro 0.13.4",
-]
-
 [[package]]
 name = "darling"
 version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4529658bdda7fd6769b8614be250cdcfc3aeb0ee72fe66f9e41e5e5eb73eac02"
 dependencies = [
- "darling_core 0.14.1",
- "darling_macro 0.14.1",
-]
-
-[[package]]
-name = "darling_core"
-version = "0.13.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "859d65a907b6852c9361e3185c862aae7fafd2887876799fa55f5f99dc40d610"
-dependencies = [
- "fnv",
- "ident_case",
- "proc-macro2",
- "quote",
- "syn",
+ "darling_core",
+ "darling_macro",
 ]
 
 [[package]]
@@ -1231,24 +1208,13 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "darling_macro"
-version = "0.13.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c972679f83bdf9c42bd905396b6c3588a843a17f0f16dfcfa3e2c5d57441835"
-dependencies = [
- "darling_core 0.13.4",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "darling_macro"
 version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ddfc69c5bfcbd2fc09a0f38451d2daf0e372e367986a83906d1b0dbc88134fb5"
 dependencies = [
- "darling_core 0.14.1",
+ "darling_core",
  "quote",
  "syn",
 ]
@@ -2912,7 +2878,6 @@ dependencies = [
  "mas-jose",
  "parse-display",
  "serde",
- "serde-enum-str",
  "serde_json",
  "serde_with",
  "sha2 0.10.5",
@@ -4062,36 +4027,6 @@ dependencies = [
  "serde_derive",
 ]
 
-[[package]]
-name = "serde-attributes"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3aba2af3c3b9cd6f3a919056dac6005b71fceecc1cdfa65c4df3912f64e07e60"
-dependencies = [
- "darling_core 0.13.4",
- "serde-rename-rule",
- "syn",
-]
-
-[[package]]
-name = "serde-enum-str"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2a41bf2fc78a58589b9a6948bfc918c9b2dc918732f2ac14eed982ffb876b39"
-dependencies = [
- "darling 0.13.4",
- "proc-macro2",
- "quote",
- "serde-attributes",
- "syn",
-]
-
-[[package]]
-name = "serde-rename-rule"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd2930103714ccef4f1fe5b6a5f2b6fdcfe462a6c802464714bd41e5b5097c33"
-
 [[package]]
 name = "serde_bser"
 version = "0.3.1"
@@ -4172,7 +4107,7 @@ version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "de337f322382fcdfbb21a014f7c224ee041a23785651db67b9827403178f698f"
 dependencies = [
- "darling 0.14.1",
+ "darling",
  "proc-macro2",
  "quote",
  "syn",
diff --git a/crates/oauth2-types/Cargo.toml b/crates/oauth2-types/Cargo.toml
index 40a10bec..4f1dcf73 100644
--- a/crates/oauth2-types/Cargo.toml
+++ b/crates/oauth2-types/Cargo.toml
@@ -19,7 +19,6 @@ sha2 = "0.10.5"
 data-encoding = "2.3.2"
 thiserror = "1.0.34"
 itertools = "0.10.3"
-serde-enum-str = "0.2.5"
 
 mas-iana = { path = "../iana" }
 mas-jose = { path = "../jose" }
diff --git a/crates/oauth2-types/src/errors.rs b/crates/oauth2-types/src/errors.rs
index 0d39daa7..c14179c4 100644
--- a/crates/oauth2-types/src/errors.rs
+++ b/crates/oauth2-types/src/errors.rs
@@ -14,8 +14,9 @@
 
 use std::borrow::Cow;
 
+use parse_display::{Display, FromStr};
 use serde::{Deserialize, Serialize};
-use serde_enum_str::{Deserialize_enum_str, Serialize_enum_str};
+use serde_with::{DeserializeFromStr, SerializeDisplay};
 
 /// A client error returned by an authorization server.
 ///
@@ -55,8 +56,8 @@ impl From<ClientErrorCode> for ClientError {
     }
 }
 
-#[derive(Debug, Clone, PartialEq, Eq, Serialize_enum_str, Deserialize_enum_str)]
-#[serde(rename_all = "snake_case")]
+#[derive(Debug, Clone, PartialEq, Eq, Display, FromStr, SerializeDisplay, DeserializeFromStr)]
+#[display(style = "snake_case")]
 pub enum ClientErrorCode {
     /// `invalid_request`
     ///
@@ -225,7 +226,7 @@ pub enum ClientErrorCode {
     InvalidClientMetadata,
 
     /// Another error code.
-    #[serde(other)]
+    #[display("{0}")]
     Unknown(String),
 }
 
@@ -307,3 +308,195 @@ impl ClientErrorCode {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn serialize_client_error_code() {
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::InvalidRequest).unwrap(),
+            "\"invalid_request\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::InvalidClient).unwrap(),
+            "\"invalid_client\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::InvalidGrant).unwrap(),
+            "\"invalid_grant\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::UnauthorizedClient).unwrap(),
+            "\"unauthorized_client\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::UnsupportedGrantType).unwrap(),
+            "\"unsupported_grant_type\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::AccessDenied).unwrap(),
+            "\"access_denied\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::UnsupportedResponseType).unwrap(),
+            "\"unsupported_response_type\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::InvalidScope).unwrap(),
+            "\"invalid_scope\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::ServerError).unwrap(),
+            "\"server_error\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::TemporarilyUnavailable).unwrap(),
+            "\"temporarily_unavailable\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::InteractionRequired).unwrap(),
+            "\"interaction_required\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::LoginRequired).unwrap(),
+            "\"login_required\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::AccountSelectionRequired).unwrap(),
+            "\"account_selection_required\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::ConsentRequired).unwrap(),
+            "\"consent_required\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::InvalidRequestUri).unwrap(),
+            "\"invalid_request_uri\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::InvalidRequestObject).unwrap(),
+            "\"invalid_request_object\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::RequestNotSupported).unwrap(),
+            "\"request_not_supported\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::RequestUriNotSupported).unwrap(),
+            "\"request_uri_not_supported\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::RegistrationNotSupported).unwrap(),
+            "\"registration_not_supported\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::InvalidRedirectUri).unwrap(),
+            "\"invalid_redirect_uri\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::InvalidClientMetadata).unwrap(),
+            "\"invalid_client_metadata\""
+        );
+
+        assert_eq!(
+            serde_json::to_string(&ClientErrorCode::Unknown("unknown_error_code".to_owned()))
+                .unwrap(),
+            "\"unknown_error_code\""
+        );
+    }
+
+    #[test]
+    fn deserialize_client_error_code() {
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"invalid_request\"").unwrap(),
+            ClientErrorCode::InvalidRequest
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"invalid_client\"").unwrap(),
+            ClientErrorCode::InvalidClient
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"invalid_grant\"").unwrap(),
+            ClientErrorCode::InvalidGrant
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"unauthorized_client\"").unwrap(),
+            ClientErrorCode::UnauthorizedClient
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"unsupported_grant_type\"").unwrap(),
+            ClientErrorCode::UnsupportedGrantType
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"access_denied\"").unwrap(),
+            ClientErrorCode::AccessDenied
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"unsupported_response_type\"").unwrap(),
+            ClientErrorCode::UnsupportedResponseType
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"invalid_scope\"").unwrap(),
+            ClientErrorCode::InvalidScope
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"server_error\"").unwrap(),
+            ClientErrorCode::ServerError
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"temporarily_unavailable\"").unwrap(),
+            ClientErrorCode::TemporarilyUnavailable
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"interaction_required\"").unwrap(),
+            ClientErrorCode::InteractionRequired
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"login_required\"").unwrap(),
+            ClientErrorCode::LoginRequired
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"account_selection_required\"").unwrap(),
+            ClientErrorCode::AccountSelectionRequired
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"consent_required\"").unwrap(),
+            ClientErrorCode::ConsentRequired
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"invalid_request_uri\"").unwrap(),
+            ClientErrorCode::InvalidRequestUri
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"invalid_request_object\"").unwrap(),
+            ClientErrorCode::InvalidRequestObject
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"request_not_supported\"").unwrap(),
+            ClientErrorCode::RequestNotSupported
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"request_uri_not_supported\"").unwrap(),
+            ClientErrorCode::RequestUriNotSupported
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"registration_not_supported\"").unwrap(),
+            ClientErrorCode::RegistrationNotSupported
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"invalid_redirect_uri\"").unwrap(),
+            ClientErrorCode::InvalidRedirectUri
+        );
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"invalid_client_metadata\"").unwrap(),
+            ClientErrorCode::InvalidClientMetadata
+        );
+
+        assert_eq!(
+            serde_json::from_str::<ClientErrorCode>("\"unknown_error_code\"").unwrap(),
+            ClientErrorCode::Unknown("unknown_error_code".to_owned())
+        );
+    }
+}
diff --git a/crates/oauth2-types/src/oidc.rs b/crates/oauth2-types/src/oidc.rs
index 89704ff5..d74181f3 100644
--- a/crates/oauth2-types/src/oidc.rs
+++ b/crates/oauth2-types/src/oidc.rs
@@ -22,29 +22,36 @@ use mas_iana::{
         PkceCodeChallengeMethod,
     },
 };
+use parse_display::{Display, FromStr};
 use serde::{Deserialize, Serialize};
-use serde_with::skip_serializing_none;
+use serde_with::{skip_serializing_none, DeserializeFromStr, SerializeDisplay};
 use thiserror::Error;
 use url::Url;
 
 use crate::requests::{Display, GrantType, Prompt, ResponseMode};
 
-#[derive(Serialize, Deserialize, Clone, Copy, PartialEq, Eq, Hash, Debug)]
-#[serde(rename_all = "lowercase")]
+#[derive(
+    SerializeDisplay, DeserializeFromStr, Clone, Copy, PartialEq, Eq, Hash, Debug, Display, FromStr,
+)]
+#[display(style = "lowercase")]
 pub enum ApplicationType {
     Web,
     Native,
 }
 
-#[derive(Serialize, Deserialize, Clone, Copy, PartialEq, Eq, Hash, Debug)]
-#[serde(rename_all = "lowercase")]
+#[derive(
+    SerializeDisplay, DeserializeFromStr, Clone, Copy, PartialEq, Eq, Hash, Debug, Display, FromStr,
+)]
+#[display(style = "lowercase")]
 pub enum SubjectType {
     Public,
     Pairwise,
 }
 
-#[derive(Serialize, Deserialize, Clone, Copy, PartialEq, Eq, Hash, Debug)]
-#[serde(rename_all = "lowercase")]
+#[derive(
+    SerializeDisplay, DeserializeFromStr, Clone, Copy, PartialEq, Eq, Hash, Debug, Display, FromStr,
+)]
+#[display(style = "lowercase")]
 pub enum ClaimType {
     Normal,
     Aggregated,
@@ -918,7 +925,7 @@ mod tests {
     };
     use url::Url;
 
-    use super::{ProviderMetadata, ProviderMetadataVerificationError, SubjectType};
+    use super::*;
 
     fn valid_provider_metadata() -> (ProviderMetadata, Url) {
         let issuer = Url::parse("https://localhost").unwrap();
@@ -1407,4 +1414,84 @@ mod tests {
             Some(Url::parse("https://localhost/par?query#fragment").unwrap());
         metadata.validate(&issuer).unwrap();
     }
+
+    #[test]
+    fn serialize_application_type() {
+        assert_eq!(
+            serde_json::to_string(&ApplicationType::Web).unwrap(),
+            "\"web\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ApplicationType::Native).unwrap(),
+            "\"native\""
+        );
+    }
+
+    #[test]
+    fn deserialize_application_type() {
+        assert_eq!(
+            serde_json::from_str::<ApplicationType>("\"web\"").unwrap(),
+            ApplicationType::Web
+        );
+        assert_eq!(
+            serde_json::from_str::<ApplicationType>("\"native\"").unwrap(),
+            ApplicationType::Native
+        );
+    }
+
+    #[test]
+    fn serialize_subject_type() {
+        assert_eq!(
+            serde_json::to_string(&SubjectType::Public).unwrap(),
+            "\"public\""
+        );
+        assert_eq!(
+            serde_json::to_string(&SubjectType::Pairwise).unwrap(),
+            "\"pairwise\""
+        );
+    }
+
+    #[test]
+    fn deserialize_subject_type() {
+        assert_eq!(
+            serde_json::from_str::<SubjectType>("\"public\"").unwrap(),
+            SubjectType::Public
+        );
+        assert_eq!(
+            serde_json::from_str::<SubjectType>("\"pairwise\"").unwrap(),
+            SubjectType::Pairwise
+        );
+    }
+
+    #[test]
+    fn serialize_claim_type() {
+        assert_eq!(
+            serde_json::to_string(&ClaimType::Normal).unwrap(),
+            "\"normal\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClaimType::Aggregated).unwrap(),
+            "\"aggregated\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ClaimType::Distributed).unwrap(),
+            "\"distributed\""
+        );
+    }
+
+    #[test]
+    fn deserialize_claim_type() {
+        assert_eq!(
+            serde_json::from_str::<ClaimType>("\"normal\"").unwrap(),
+            ClaimType::Normal
+        );
+        assert_eq!(
+            serde_json::from_str::<ClaimType>("\"aggregated\"").unwrap(),
+            ClaimType::Aggregated
+        );
+        assert_eq!(
+            serde_json::from_str::<ClaimType>("\"distributed\"").unwrap(),
+            ClaimType::Distributed
+        );
+    }
 }
diff --git a/crates/oauth2-types/src/requests.rs b/crates/oauth2-types/src/requests.rs
index e17ebaa9..3e2e8f4f 100644
--- a/crates/oauth2-types/src/requests.rs
+++ b/crates/oauth2-types/src/requests.rs
@@ -22,8 +22,8 @@ use mas_iana::oauth::{
 use parse_display::{Display, FromStr};
 use serde::{Deserialize, Serialize};
 use serde_with::{
-    formats::SpaceSeparator, serde_as, skip_serializing_none, DisplayFromStr, DurationSeconds,
-    StringWithSeparator, TimestampSeconds,
+    formats::SpaceSeparator, serde_as, skip_serializing_none, DeserializeFromStr, DisplayFromStr,
+    DurationSeconds, SerializeDisplay, StringWithSeparator, TimestampSeconds,
 };
 use url::Url;
 
@@ -46,10 +46,10 @@ use crate::scope::Scope;
     Copy,
     Display,
     FromStr,
-    Serialize,
-    Deserialize,
+    SerializeDisplay,
+    DeserializeFromStr,
 )]
-#[serde(rename_all = "snake_case")]
+#[display(style = "snake_case")]
 pub enum ResponseMode {
     /// Authorization Response parameters are encoded in the query string added
     /// to the `redirect_uri`.
@@ -84,10 +84,10 @@ pub enum ResponseMode {
     Copy,
     Display,
     FromStr,
-    Serialize,
-    Deserialize,
+    SerializeDisplay,
+    DeserializeFromStr,
 )]
-#[serde(rename_all = "snake_case")]
+#[display(style = "snake_case")]
 pub enum Display {
     /// The Authorization Server should display the authentication and consent
     /// UI consistent with a full User Agent page view.
@@ -129,11 +129,10 @@ impl Default for Display {
     Copy,
     Display,
     FromStr,
-    Serialize,
-    Deserialize,
+    SerializeDisplay,
+    DeserializeFromStr,
 )]
 #[display(style = "snake_case")]
-#[serde(rename_all = "snake_case")]
 pub enum Prompt {
     /// The Authorization Server must not display any authentication or consent
     /// user interface pages.
@@ -366,10 +365,10 @@ pub struct ClientCredentialsGrant {
     Copy,
     Display,
     FromStr,
-    Serialize,
-    Deserialize,
+    SerializeDisplay,
+    DeserializeFromStr,
 )]
-#[serde(rename_all = "snake_case")]
+#[display(style = "snake_case")]
 pub enum GrantType {
     /// [`authorization_code`](https://www.rfc-editor.org/rfc/rfc6749#section-4.1)
     AuthorizationCode,
@@ -387,11 +386,11 @@ pub enum GrantType {
     Password,
 
     /// [`urn:ietf:params:oauth:grant-type:device_code`](https://www.rfc-editor.org/rfc/rfc8628)
-    #[serde(rename = "urn:ietf:params:oauth:grant-type:device_code")]
+    #[display("urn:ietf:params:oauth:grant-type:device_code")]
     DeviceCode,
 
     /// [`urn:openid:params:grant-type:ciba`](https://openid.net/specs/openid-client-initiated-backchannel-authentication-core-1_0.html)
-    #[serde(rename = "urn:openid:params:grant-type:ciba")]
+    #[display("urn:openid:params:grant-type:ciba")]
     ClientInitiatedBackchannelAuthentication,
 }
 
@@ -667,4 +666,106 @@ mod tests {
             GrantType::ClientInitiatedBackchannelAuthentication
         );
     }
+
+    #[test]
+    fn serialize_response_mode() {
+        assert_eq!(
+            serde_json::to_string(&ResponseMode::Query).unwrap(),
+            "\"query\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ResponseMode::Fragment).unwrap(),
+            "\"fragment\""
+        );
+        assert_eq!(
+            serde_json::to_string(&ResponseMode::FormPost).unwrap(),
+            "\"form_post\""
+        );
+    }
+
+    #[test]
+    fn deserialize_response_mode() {
+        assert_eq!(
+            serde_json::from_str::<ResponseMode>("\"query\"").unwrap(),
+            ResponseMode::Query
+        );
+        assert_eq!(
+            serde_json::from_str::<ResponseMode>("\"fragment\"").unwrap(),
+            ResponseMode::Fragment
+        );
+        assert_eq!(
+            serde_json::from_str::<ResponseMode>("\"form_post\"").unwrap(),
+            ResponseMode::FormPost
+        );
+    }
+
+    #[test]
+    fn serialize_display() {
+        assert_eq!(serde_json::to_string(&Display::Page).unwrap(), "\"page\"");
+        assert_eq!(serde_json::to_string(&Display::Popup).unwrap(), "\"popup\"");
+        assert_eq!(serde_json::to_string(&Display::Touch).unwrap(), "\"touch\"");
+        assert_eq!(serde_json::to_string(&Display::Wap).unwrap(), "\"wap\"");
+    }
+
+    #[test]
+    fn deserialize_display() {
+        assert_eq!(
+            serde_json::from_str::<Display>("\"page\"").unwrap(),
+            Display::Page
+        );
+        assert_eq!(
+            serde_json::from_str::<Display>("\"popup\"").unwrap(),
+            Display::Popup
+        );
+        assert_eq!(
+            serde_json::from_str::<Display>("\"touch\"").unwrap(),
+            Display::Touch
+        );
+        assert_eq!(
+            serde_json::from_str::<Display>("\"wap\"").unwrap(),
+            Display::Wap
+        );
+    }
+
+    #[test]
+    fn serialize_prompt() {
+        assert_eq!(serde_json::to_string(&Prompt::None).unwrap(), "\"none\"");
+        assert_eq!(serde_json::to_string(&Prompt::Login).unwrap(), "\"login\"");
+        assert_eq!(
+            serde_json::to_string(&Prompt::Consent).unwrap(),
+            "\"consent\""
+        );
+        assert_eq!(
+            serde_json::to_string(&Prompt::SelectAccount).unwrap(),
+            "\"select_account\""
+        );
+        assert_eq!(
+            serde_json::to_string(&Prompt::Create).unwrap(),
+            "\"create\""
+        );
+    }
+
+    #[test]
+    fn deserialize_prompt() {
+        assert_eq!(
+            serde_json::from_str::<Prompt>("\"none\"").unwrap(),
+            Prompt::None
+        );
+        assert_eq!(
+            serde_json::from_str::<Prompt>("\"login\"").unwrap(),
+            Prompt::Login
+        );
+        assert_eq!(
+            serde_json::from_str::<Prompt>("\"consent\"").unwrap(),
+            Prompt::Consent
+        );
+        assert_eq!(
+            serde_json::from_str::<Prompt>("\"select_account\"").unwrap(),
+            Prompt::SelectAccount
+        );
+        assert_eq!(
+            serde_json::from_str::<Prompt>("\"create\"").unwrap(),
+            Prompt::Create
+        );
+    }
 }