diff --git a/src/gurobi_logtools/parsers/pretree_solutions.py b/src/gurobi_logtools/parsers/pretree_solutions.py
index 046e614..34a5a7b 100644
--- a/src/gurobi_logtools/parsers/pretree_solutions.py
+++ b/src/gurobi_logtools/parsers/pretree_solutions.py
@@ -2,8 +2,8 @@
 
 from gurobi_logtools.parsers.util import typeconvert_groupdict
 
-class PretreeSolutionParser:
 
+class PretreeSolutionParser:
     pretree_solution_regex = re.compile(
         r"Found heuristic solution:\sobjective\s(?P<Incumbent>[^\s]+)"
     )
@@ -17,7 +17,7 @@ def __init__(self):
         """
         self._progress = []
         self._summary = {}
-        #self._started = False
+        # self._started = False
 
     def parse(self, line: str) -> bool:
         """Parse the given log line to populate summary data.
@@ -36,10 +36,8 @@ def parse(self, line: str) -> bool:
 
     def get_summary(self) -> dict:
         """Return the current parsed summary."""
-        return {
-            "PreTreeSolutions": len(self._progress)
-        }
-    
+        return {"PreTreeSolutions": len(self._progress)}
+
     def get_progress(self) -> list:
         """Return the progress of the search tree."""
-        return self._progress
\ No newline at end of file
+        return self._progress
diff --git a/tests/parsers/test_pretreesols.py b/tests/parsers/test_pretreesols.py
index 2fc415e..1b8c781 100644
--- a/tests/parsers/test_pretreesols.py
+++ b/tests/parsers/test_pretreesols.py
@@ -1,7 +1,7 @@
 from unittest import TestCase, main
 
-from gurobi_logtools.parsers.presolve import PresolveParser
 from gurobi_logtools.parsers.continuous import ContinuousParser
+from gurobi_logtools.parsers.presolve import PresolveParser
 from gurobi_logtools.parsers.pretree_solutions import PretreeSolutionParser
 from gurobi_logtools.parsers.util import parse_lines
 
@@ -25,10 +25,10 @@
 
 expected_summary = {"PreTreeSolutions": 3}
 
-expected_progress =     [
-    {'Incumbent': 1133356000.0},
-    {'Incumbent': 2133356000.0},
-    {'Incumbent': 3133356000.0},
+expected_progress = [
+    {"Incumbent": 1133356000.0},
+    {"Incumbent": 2133356000.0},
+    {"Incumbent": 3133356000.0},
 ]
 
 example_log_1 = """
@@ -63,9 +63,10 @@
 Optimal objective  2.174035714e+02
 """
 
-example_logs = (example_log_0,example_log_1)
+example_logs = (example_log_0, example_log_1)
 parsers = (PresolveParser, ContinuousParser)
 
+
 class TestPresolve(TestCase):
     def setUp(self):
         pass
@@ -91,4 +92,4 @@ def test_get_progress_presolve(self):
 
 
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    main()