diff --git a/matrix_sdk_crypto/src/memory_stores.rs b/matrix_sdk_crypto/src/memory_stores.rs
index be7aba34..f38f476e 100644
--- a/matrix_sdk_crypto/src/memory_stores.rs
+++ b/matrix_sdk_crypto/src/memory_stores.rs
@@ -292,8 +292,8 @@ mod test {
 
         let user_devices = store.user_devices(device.user_id());
 
-        assert_eq!(user_devices.keys().nth(0).unwrap(), device.device_id());
-        assert_eq!(user_devices.devices().nth(0).unwrap(), &device);
+        assert_eq!(user_devices.keys().next().unwrap(), device.device_id());
+        assert_eq!(user_devices.devices().next().unwrap(), &device);
 
         let loaded_device = user_devices.get(device.device_id()).unwrap();
 
diff --git a/matrix_sdk_crypto/src/olm.rs b/matrix_sdk_crypto/src/olm.rs
index aece7912..5c4f6f0d 100644
--- a/matrix_sdk_crypto/src/olm.rs
+++ b/matrix_sdk_crypto/src/olm.rs
@@ -1066,7 +1066,7 @@ pub(crate) mod test {
             .await
             .curve25519()
             .iter()
-            .nth(0)
+            .next()
             .unwrap()
             .1
             .to_owned();
@@ -1143,7 +1143,7 @@ pub(crate) mod test {
         let one_time_key = one_time_keys
             .curve25519()
             .iter()
-            .nth(0)
+            .next()
             .unwrap()
             .1
             .to_owned();
diff --git a/matrix_sdk_crypto/src/store/memorystore.rs b/matrix_sdk_crypto/src/store/memorystore.rs
index ccef2efd..a911320f 100644
--- a/matrix_sdk_crypto/src/store/memorystore.rs
+++ b/matrix_sdk_crypto/src/store/memorystore.rs
@@ -200,8 +200,8 @@ mod test {
 
         let user_devices = store.get_user_devices(device.user_id()).await.unwrap();
 
-        assert_eq!(user_devices.keys().nth(0).unwrap(), device.device_id());
-        assert_eq!(user_devices.devices().nth(0).unwrap(), &device);
+        assert_eq!(user_devices.keys().next().unwrap(), device.device_id());
+        assert_eq!(user_devices.devices().next().unwrap(), &device);
 
         let loaded_device = user_devices.get(device.device_id()).unwrap();
 
diff --git a/matrix_sdk_crypto/src/store/sqlite.rs b/matrix_sdk_crypto/src/store/sqlite.rs
index bfa26664..cfda0a62 100644
--- a/matrix_sdk_crypto/src/store/sqlite.rs
+++ b/matrix_sdk_crypto/src/store/sqlite.rs
@@ -866,7 +866,7 @@ mod test {
             .await
             .curve25519()
             .iter()
-            .nth(0)
+            .next()
             .unwrap()
             .1
             .to_owned();
@@ -1165,8 +1165,8 @@ mod test {
         assert_eq!(device.keys(), loaded_device.keys());
 
         let user_devices = store.get_user_devices(device.user_id()).await.unwrap();
-        assert_eq!(user_devices.keys().nth(0).unwrap(), device.device_id());
-        assert_eq!(user_devices.devices().nth(0).unwrap(), &device);
+        assert_eq!(user_devices.keys().next().unwrap(), device.device_id());
+        assert_eq!(user_devices.devices().next().unwrap(), &device);
     }
 
     #[tokio::test]