diff --git a/slither/core/declarations/contract.py b/slither/core/declarations/contract.py
index 94c72786b..fc656b855 100644
--- a/slither/core/declarations/contract.py
+++ b/slither/core/declarations/contract.py
@@ -102,7 +102,9 @@ class Contract(SourceMapping):  # pylint: disable=too-many-public-methods
         self.file_scope: "FileScope" = scope
 
         # memoize
-        self._state_variables_used_in_reentrant_targets: Optional[Dict["StateVariable", Set[Union["StateVariable", "Function"]]]]= None
+        self._state_variables_used_in_reentrant_targets: Optional[
+            Dict["StateVariable", Set[Union["StateVariable", "Function"]]]
+        ] = None
 
     ###################################################################################
     ###################################################################################
@@ -354,7 +356,9 @@ class Contract(SourceMapping):  # pylint: disable=too-many-public-methods
         return list(set(slithir_variables))
 
     @property
-    def state_variables_used_in_reentrant_targets(self) -> Dict["StateVariable", Set[Union["StateVariable", "Function"]]]:
+    def state_variables_used_in_reentrant_targets(
+        self,
+    ) -> Dict["StateVariable", Set[Union["StateVariable", "Function"]]]:
         """
         Returns the state variables used in reentrant targets. Heuristics:
         - Variable used (read/write) in entry points that are reentrant
@@ -362,9 +366,12 @@ class Contract(SourceMapping):  # pylint: disable=too-many-public-methods
 
         """
         from slither.core.variables.state_variable import StateVariable
+
         if self._state_variables_used_in_reentrant_targets is None:
             reentrant_functions = [f for f in self.functions_entry_points if f.is_reentrant]
-            variables_used: Dict[StateVariable, Set[Union[StateVariable, "Function"]]] = defaultdict(set)
+            variables_used: Dict[
+                StateVariable, Set[Union[StateVariable, "Function"]]
+            ] = defaultdict(set)
             for function in reentrant_functions:
                 for ir in function.all_slithir_operations():
                     state_variables = [v for v in ir.used if isinstance(v, StateVariable)]
diff --git a/slither/detectors/reentrancy/reentrancy_eth.py b/slither/detectors/reentrancy/reentrancy_eth.py
index b8ae6afbc..c5183e82f 100644
--- a/slither/detectors/reentrancy/reentrancy_eth.py
+++ b/slither/detectors/reentrancy/reentrancy_eth.py
@@ -74,14 +74,11 @@ Bob uses the re-entrancy bug to call `withdrawBalance` two times, and withdraw m
                                     v,
                                     node,
                                     tuple(sorted(nodes, key=lambda x: x.node_id)),
-                                    tuple(variables_used_in_reentrancy[v])
+                                    tuple(variables_used_in_reentrancy[v]),
                                 )
                                 for (v, nodes) in node.context[self.KEY].written.items()
                                 if v in node.context[self.KEY].reads_prior_calls[c]
-                                and (
-                                    f.is_reentrant
-                                    or v in variables_used_in_reentrancy
-                                )
+                                and (f.is_reentrant or v in variables_used_in_reentrancy)
                             }
 
                         if read_then_written:
@@ -132,7 +129,11 @@ Bob uses the re-entrancy bug to call `withdrawBalance` two times, and withdraw m
                     if other_node != finding_value.node:
                         info += ["\t\t- ", other_node, "\n"]
                 if finding_value.cross_functions:
-                    info += ["\t", finding_value.variable," can be used in cross function reentrancies:\n"]
+                    info += [
+                        "\t",
+                        finding_value.variable,
+                        " can be used in cross function reentrancies:\n",
+                    ]
                     for cross in finding_value.cross_functions:
                         info += ["\t- ", cross, "\n"]
 
diff --git a/slither/detectors/reentrancy/reentrancy_read_before_write.py b/slither/detectors/reentrancy/reentrancy_read_before_write.py
index 3b90437d5..fff022d5e 100644
--- a/slither/detectors/reentrancy/reentrancy_read_before_write.py
+++ b/slither/detectors/reentrancy/reentrancy_read_before_write.py
@@ -70,14 +70,11 @@ Do not report reentrancies that involve Ether (see `reentrancy-eth`)."""
                                     v,
                                     node,
                                     tuple(sorted(nodes, key=lambda x: x.node_id)),
-                                    tuple(variables_used_in_reentrancy[v])
+                                    tuple(variables_used_in_reentrancy[v]),
                                 )
                                 for (v, nodes) in node.context[self.KEY].written.items()
                                 if v in node.context[self.KEY].reads_prior_calls[c]
-                                and (
-                                    f.is_reentrant
-                                    or v in variables_used_in_reentrancy
-                                )
+                                and (f.is_reentrant or v in variables_used_in_reentrancy)
                             }
 
                         # We found a potential re-entrancy bug
@@ -120,7 +117,11 @@ Do not report reentrancies that involve Ether (see `reentrancy-eth`)."""
                     if other_node != finding_value.node:
                         info += ["\t\t- ", other_node, "\n"]
                 if finding_value.cross_functions:
-                    info += ["\t", finding_value.variable," can be used in cross function reentrancies:\n"]
+                    info += [
+                        "\t",
+                        finding_value.variable,
+                        " can be used in cross function reentrancies:\n",
+                    ]
                     for cross in finding_value.cross_functions:
                         info += ["\t- ", cross, "\n"]