diff --git a/tests/test_core.py b/tests/test_core.py
index 5593885..da93695 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -1,6 +1,5 @@
 from optionlab.models import Inputs, Outputs
 from optionlab.strategy import StrategyEngine
-import datetime as dt
 
 
 def test_covered_call(nvidia):
@@ -10,7 +9,7 @@ def test_covered_call(nvidia):
         nvidia
         | {
             # The covered call strategy is defined
-            'strategy': [
+            "strategy": [
                 {"type": "stock", "n": 100, "action": "buy"},
                 {
                     "type": "call",
@@ -51,8 +50,8 @@ def test_covered_call_w_days_to_target(nvidia):
     inputs = Inputs.model_validate(
         nvidia
         | {
-            'days_to_target_date': 30,
-            'strategy': [
+            "days_to_target_date": 30,
+            "strategy": [
                 {"type": "stock", "n": 100, "action": "buy"},
                 {
                     "type": "call",
@@ -80,7 +79,7 @@ def test_covered_call_w_prev_position(nvidia):
         nvidia
         | {
             # The covered call strategy is defined
-            'strategy': [
+            "strategy": [
                 {"type": "stock", "n": 100, "action": "buy", "prev_pos": 158.99},
                 {
                     "type": "call",
@@ -121,7 +120,7 @@ def test_100_perc_itm(nvidia):
         nvidia
         | {
             # The covered call strategy is defined
-            'strategy': [
+            "strategy": [
                 {
                     "type": "call",
                     "strike": 165.0,
diff --git a/tests/test_models.py b/tests/test_models.py
index c876636..fedb2d7 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -1,7 +1,9 @@
+import datetime as dt
+
 import pytest
 
 from optionlab.models import Inputs
-import datetime as dt
+
 
 def test_only_one_closed_position(nvidia):
 
@@ -16,17 +18,14 @@ def test_only_one_closed_position(nvidia):
     with pytest.raises(ValueError) as err:
         Inputs.model_validate(inputs)
 
-    assert (
-        "Only one position of type 'closed' is allowed!"
-        in str(err.value)
-    )
+    assert "Only one position of type 'closed' is allowed!" in str(err.value)
 
 
 def test_validate_dates(nvidia):
     strategy = [{"type": "closed", "prev_pos": 100}]
     inputs = nvidia | {
-        'start_date': dt.date(2023, 1, 14),
-        'target_date': dt.date(2023, 1, 10),
+        "start_date": dt.date(2023, 1, 14),
+        "target_date": dt.date(2023, 1, 10),
         "strategy": strategy,
     }
 
@@ -36,8 +35,8 @@ def test_validate_dates(nvidia):
     assert "Start date must be before target date!" in str(err.value)
 
     inputs = nvidia | {
-        'start_date': dt.date(2023, 1, 14),
-        'target_date': dt.date(2023, 1, 17),
+        "start_date": dt.date(2023, 1, 14),
+        "target_date": dt.date(2023, 1, 17),
         "strategy": [
             {
                 "type": "call",
@@ -56,23 +55,25 @@ def test_validate_dates(nvidia):
     assert "Expiration dates must be after or on target date!" in str(err.value)
 
     inputs = nvidia | {
-            'start_date': None,
-            'target_date': None,
-            'days_to_target_date': 30,
-            'strategy': [
-                {"type": "stock", "n": 100, "action": "buy"},
-                {
-                    "type": "call",
-                    "strike": 185.0,
-                    "premium": 4.1,
-                    "n": 100,
-                    "action": "sell",
-                    "expiration": dt.date(2023, 1, 17),
-                },
-            ],
-        }
+        "start_date": None,
+        "target_date": None,
+        "days_to_target_date": 30,
+        "strategy": [
+            {"type": "stock", "n": 100, "action": "buy"},
+            {
+                "type": "call",
+                "strike": 185.0,
+                "premium": 4.1,
+                "n": 100,
+                "action": "sell",
+                "expiration": dt.date(2023, 1, 17),
+            },
+        ],
+    }
 
     with pytest.raises(ValueError) as err:
         Inputs.model_validate(inputs)
 
-    assert "You can't mix a strategy expiration with a days_to_target_date." in str(err.value)
+    assert "You can't mix a strategy expiration with a days_to_target_date." in str(
+        err.value
+    )