diff --git a/src/minizinc/helpers.py b/src/minizinc/helpers.py
index 3c6ce13..1ff2308 100644
--- a/src/minizinc/helpers.py
+++ b/src/minizinc/helpers.py
@@ -57,8 +57,10 @@ def check_result(
 
     return True
 
+
 class TimeoutError(Exception):
     """Exception raised for timeout errors (UNKNOWN status) when checking solutions"""
+
     pass
 
 
@@ -102,7 +104,9 @@ def check_solution(
     check = instance.solve(time_limit=time_limit)
 
     if check.status is minizinc.Status.UNKNOWN:
-        raise TimeoutError(f"Solution checking failed because the checker exceeded the allotted time limit of {time_limit}")
+        raise TimeoutError(
+            f"Solution checking failed because the checker exceeded the allotted time limit of {time_limit}"
+        )
     elif status == check.status:
         return True
     return check.status in [
diff --git a/src/minizinc/instance.py b/src/minizinc/instance.py
index ea4dd11..5a148c7 100644
--- a/src/minizinc/instance.py
+++ b/src/minizinc/instance.py
@@ -288,7 +288,10 @@ async def solutions(
         """
         # rewrite deprecated option `timeout`
         if timeout is not None and time_limit is None:
-            warnings.warn("The usage of the `timeout` parameter is deprecated, please use the `time_limit` parameter instead.", DeprecationWarning)
+            warnings.warn(
+                "The usage of the `timeout` parameter is deprecated, please use the `time_limit` parameter instead.",
+                DeprecationWarning,
+            )
             time_limit = timeout
 
         method = self.method  # Ensure self.analyse() has been executed
@@ -693,7 +696,10 @@ def flat(
         """
         # rewrite deprecated option `timeout`
         if timeout is not None and time_limit is None:
-            warnings.warn("The usage of the `timeout` parameter is deprecated, please use the `time_limit` parameter instead.", DeprecationWarning)
+            warnings.warn(
+                "The usage of the `timeout` parameter is deprecated, please use the `time_limit` parameter instead.",
+                DeprecationWarning,
+            )
             time_limit = timeout
 
         cmd: List[Any] = ["--compile", "--statistics"]