diff --git a/src/file/uploading.rs b/src/file/uploading.rs
index b15478c..021264e 100644
--- a/src/file/uploading.rs
+++ b/src/file/uploading.rs
@@ -145,7 +145,7 @@ mod tests {
         sharry::{Client, json::NewShareRequest},
         test_util::{
             MockClient, create_file,
-            data::{DATA_LENGTHS_BAD, cases, cases_with},
+            data::{DATA_LENGTHS_BAD, cases, cases_with, data},
         },
     };
 
@@ -248,13 +248,13 @@ mod tests {
 
     #[test]
     fn check_rewind_works() {
-        let cases = cases()
+        let data = cases()
             // ignore "empty" testcase
             .filter(|&(_, size)| size > 0)
             // remove "size"
             .map(|(content, _)| content);
 
-        for content in cases {
+        for content in data {
             let (mut upl, _share_id, _file) = create_uploading(content);
 
             // read 1 byte and rewind
@@ -269,4 +269,72 @@ mod tests {
             assert!(upl.rewind().is_none());
         }
     }
+
+    #[test]
+    fn upload_works() {
+        let client = MockClient::default();
+        let uri = sharry::Uri::from(true);
+        let alias_id = sharry::AliasID::from(true);
+
+        let share_id = client
+            .share_create(&uri, &alias_id, NewShareRequest::new("share", 0))
+            .unwrap();
+
+        let mut buf = vec![0; 1024 * 1024];
+
+        for content in data() {
+            let file = create_file(content);
+            let mut upl = Checked::new(file.path())
+                .unwrap()
+                .start_upload(&client, &uri, &alias_id, &share_id)
+                .unwrap();
+
+            while let Ok(chunk) = upl.read(&mut buf) {
+                assert!(
+                    client
+                        .file_patch(&uri, &alias_id, &share_id, &chunk)
+                        .is_ok()
+                );
+            }
+
+            assert_eq!(upl.offset, upl.size);
+        }
+    }
+
+    #[test]
+    fn check_upload_bad_align() {
+        let data = cases()
+            // ignore "empty" testcase
+            .filter(|&(_, size)| size >= 2)
+            // remove "size"
+            .map(|(content, _)| content);
+
+        let client = MockClient::default();
+        let uri = sharry::Uri::from(true);
+        let alias_id = sharry::AliasID::from(true);
+
+        let share_id = client
+            .share_create(&uri, &alias_id, NewShareRequest::new("share", 0))
+            .unwrap();
+
+        // single-byte buffer to force bad chunk alignment
+        let mut buf = [0];
+        for content in data {
+            let file = create_file(content);
+            let mut upl = Checked::new(file.path())
+                .unwrap()
+                .start_upload(&client, &uri, &alias_id, &share_id)
+                .unwrap();
+
+            // first chunk works
+            client
+                .file_patch(&uri, &alias_id, &share_id, &upl.read(&mut buf).unwrap())
+                .unwrap();
+
+            // second chunk misaligned
+            let res = client.file_patch(&uri, &alias_id, &share_id, &upl.read(&mut buf).unwrap());
+            assert!(res.is_err());
+            assert!(res.unwrap_err().response_contains("not aligned to a MiB"));
+        }
+    }
 }