diff --git a/unrar/rarfile.py b/unrar/rarfile.py
index 0fa5bfd..519eb68 100644
--- a/unrar/rarfile.py
+++ b/unrar/rarfile.py
@@ -139,7 +139,7 @@ def __init__(self, filename, mode='r', pwd=None):
             self.comment = None
         self._load_metadata(handle)
         self._close(handle)
-    
+
     def __enter__(self):
         return self
 
@@ -388,7 +388,7 @@ def main(args=None):
         rf = RarFile(args[1], 'r')
         err = rf.testrar()
         if err:
-            print("The following enclosed file is corrupted: {!r}".format(err))
+            print(f"The following enclosed file is corrupted: {err!r}")
         print("Done testing")
     elif cmd == '-e':
         # extract
diff --git a/unrar/unrarlib.py b/unrar/unrarlib.py
index 06df081..c021865 100644
--- a/unrar/unrarlib.py
+++ b/unrar/unrarlib.py
@@ -63,8 +63,7 @@
             # find latest available version
             latest_version = max(
                 version.parse(v) for v in os.listdir(BREW_UNRAR_PATH))
-            lib_path = "{}{}/lib/{}".format(
-                BREW_UNRAR_PATH, latest_version, LIB_FILENAME)
+            lib_path = f"{BREW_UNRAR_PATH}{latest_version}/lib/{LIB_FILENAME}"
             unrarlib = ctypes.cdll.LoadLibrary(lib_path)
         else:
             raise LookupError(