diff --git a/CHANGELOG.md b/CHANGELOG.md
index 85e2c0a..f063735 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@
 * Added `Sync` and `Send` implementations to `Snapshot` (pavel-mukhanov)
 * Added `raw_iterator_cf_opt` to the DB API (rnarubin)
 * Added `DB::latest_sequence_number` method (vitvakatu)
+* Changed column families storing (aleksuss)
 
 ## 0.12.2 (2019-05-03)
 
diff --git a/src/db.rs b/src/db.rs
index 261f1f0..539282e 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -1825,13 +1825,11 @@ impl ReadOptions {
     /// that this [`ReadOptions`] value does not leave the scope too early (e.g. `DB::iterator_cf_opt`).
     pub unsafe fn set_iterate_upper_bound<K: AsRef<[u8]>>(&mut self, key: K) {
         let key = key.as_ref();
-        unsafe {
-            ffi::rocksdb_readoptions_set_iterate_upper_bound(
-                self.inner,
-                key.as_ptr() as *const c_char,
-                key.len() as size_t,
-            );
-        }
+        ffi::rocksdb_readoptions_set_iterate_upper_bound(
+            self.inner,
+            key.as_ptr() as *const c_char,
+            key.len() as size_t,
+        );
     }
 
     pub fn set_prefix_same_as_start(&mut self, v: bool) {
diff --git a/src/lib.rs b/src/lib.rs
index 0cc760c..6daba9a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -330,5 +330,4 @@ mod test {
         is_sync::<PlainTableFactoryOptions>();
         is_sync::<ColumnFamilyDescriptor>();
     }
-
 }
diff --git a/tests/test_db.rs b/tests/test_db.rs
index a2da749..cc7a85e 100644
--- a/tests/test_db.rs
+++ b/tests/test_db.rs
@@ -247,7 +247,7 @@ fn test_sequence_number() {
     {
         let db = DB::open_default(&path).unwrap();
         assert_eq!(db.latest_sequence_number(), 0);
-        db.put(b"key", b"value");
+        let _ = db.put(b"key", b"value");
         assert_eq!(db.latest_sequence_number(), 1);
     }
 }
diff --git a/tests/test_multithreaded.rs b/tests/test_multithreaded.rs
index 141007f..15e0ae8 100644
--- a/tests/test_multithreaded.rs
+++ b/tests/test_multithreaded.rs
@@ -48,19 +48,19 @@ pub fn test_multithreaded() {
         let db3 = db.clone();
         let j3 = thread::spawn(move || {
             for _ in 1..N {
-                match db3.get(b"key") {
+                let result = match db3.get(b"key") {
                     Ok(Some(v)) => {
                         if &v[..] != b"value1" && &v[..] != b"value2" {
-                            assert!(false);
+                            false
+                        } else {
+                            true
                         }
                     }
-                    _ => {
-                        assert!(false);
-                    }
-                }
+                    _ => false,
+                };
+                assert!(result);
             }
         });
-
         j1.join().unwrap();
         j2.join().unwrap();
         j3.join().unwrap();