diff --git a/jwt-authorizer/src/authorizer.rs b/jwt-authorizer/src/authorizer.rs
index 1af2a79..1c24989 100644
--- a/jwt-authorizer/src/authorizer.rs
+++ b/jwt-authorizer/src/authorizer.rs
@@ -74,14 +74,14 @@ where
                 }
             }
             KeySourceType::EC(path) => {
-                let key = DecodingKey::from_ec_der(&read_data(path.as_str())?);
+                let key = DecodingKey::from_ec_pem(&read_data(path.as_str())?)?;
                 Authorizer {
                     key_source: KeySource::DecodingKeySource(key),
                     claims_checker,
                 }
             }
             KeySourceType::ED(path) => {
-                let key = DecodingKey::from_ed_der(&read_data(path.as_str())?);
+                let key = DecodingKey::from_ed_pem(&read_data(path.as_str())?)?;
                 Authorizer {
                     key_source: KeySource::DecodingKeySource(key),
                     claims_checker,
@@ -208,14 +208,14 @@ mod tests {
 
     #[tokio::test]
     async fn build_jwks_url_error() {
-        let a = Authorizer::<Value>::build(&&KeySourceType::Jwks("://xxxx".to_owned()), None, None).await;
+        let a = Authorizer::<Value>::build(&KeySourceType::Jwks("://xxxx".to_owned()), None, None).await;
         println!("{:?}", a.as_ref().err());
         assert!(a.is_err());
     }
 
     #[tokio::test]
     async fn build_discovery_url_error() {
-        let a = Authorizer::<Value>::build(&&KeySourceType::Discovery("://xxxx".to_owned()), None, None).await;
+        let a = Authorizer::<Value>::build(&KeySourceType::Discovery("://xxxx".to_owned()), None, None).await;
         println!("{:?}", a.as_ref().err());
         assert!(a.is_err());
     }
diff --git a/jwt-authorizer/src/jwks/key_store_manager.rs b/jwt-authorizer/src/jwks/key_store_manager.rs
index 27975bb..8d31ce2 100644
--- a/jwt-authorizer/src/jwks/key_store_manager.rs
+++ b/jwt-authorizer/src/jwks/key_store_manager.rs
@@ -265,7 +265,7 @@ mod tests {
         // FAIL, NO LOAD
         let ks = KeyStore {
             jwks: jsonwebtoken::jwk::JwkSet { keys: vec![] },
-            fail_time: Some(Instant::now() - Duration::from_secs(5)),
+            fail_time: Instant::now().checked_sub(Duration::from_secs(5)),
             load_time: None,
         };
         assert!(ks.can_refresh(Duration::from_secs(0), Duration::from_secs(4)));
@@ -275,7 +275,7 @@ mod tests {
         let ks = KeyStore {
             jwks: jsonwebtoken::jwk::JwkSet { keys: vec![] },
             fail_time: None,
-            load_time: Some(Instant::now() - Duration::from_secs(5)),
+            load_time: Instant::now().checked_sub(Duration::from_secs(5)),
         };
         assert!(ks.can_refresh(Duration::from_secs(4), Duration::from_secs(0)));
         assert!(!ks.can_refresh(Duration::from_secs(6), Duration::from_secs(0)));
@@ -283,8 +283,8 @@ mod tests {
         // FAIL, LOAD
         let ks = KeyStore {
             jwks: jsonwebtoken::jwk::JwkSet { keys: vec![] },
-            fail_time: Some(Instant::now() - Duration::from_secs(5)),
-            load_time: Some(Instant::now() - Duration::from_secs(10)),
+            fail_time: Instant::now().checked_sub(Duration::from_secs(5)),
+            load_time: Instant::now().checked_sub(Duration::from_secs(10)),
         };
         assert!(ks.can_refresh(Duration::from_secs(6), Duration::from_secs(4)));
         assert!(!ks.can_refresh(Duration::from_secs(11), Duration::from_secs(4)));
@@ -324,7 +324,7 @@ mod tests {
             .and(path("/"))
             .respond_with(ResponseTemplate::new(200).set_body_json(&jwks))
             .expect(1)
-            .mount(&mock_server)
+            .mount(mock_server)
             .await;
     }
 
@@ -333,7 +333,7 @@ mod tests {
             .and(path("/"))
             .respond_with(ResponseTemplate::new(500))
             .expect(1)
-            .mount(&mock_server)
+            .mount(mock_server)
             .await;
     }
 
diff --git a/jwt-authorizer/tests/integration_tests.rs b/jwt-authorizer/tests/integration_tests.rs
index 3445506..2494852 100644
--- a/jwt-authorizer/tests/integration_tests.rs
+++ b/jwt-authorizer/tests/integration_tests.rs
@@ -91,7 +91,7 @@ impl Stats {
 
 fn discovery(uri: &str) -> Json<Value> {
     Arc::clone(&DISCOVERY_COUNTER).fetch_add(1, Ordering::Relaxed);
-    let d = serde_json::json!({ "jwks_uri": format!("{}/jwks", uri) });
+    let d = serde_json::json!({ "jwks_uri": format!("{uri}/jwks") });
 
     Json(d)
 }
@@ -287,7 +287,6 @@ async fn scenario4() {
         strategy: RefreshStrategy::NoRefresh,
         refresh_interval: Duration::from_millis(0),
         retry_interval: Duration::from_millis(0),
-        ..Default::default()
     };
     let auth: JwtAuthorizer<User> = JwtAuthorizer::from_oidc(&url).refresh(refresh);
     let mut app = app(auth).await;