diff --git a/ogcore/TPI.py b/ogcore/TPI.py
index e5dc168e1..755ac791c 100644
--- a/ogcore/TPI.py
+++ b/ogcore/TPI.py
@@ -707,7 +707,6 @@ def run_TPI(p, client=None):
 
     # TPI loop
     while (TPIiter < p.maxiter) and (TPIdist >= p.mindist_TPI):
-
         outer_loop_vars = (r_p, r, w, p_m, BQ, TR, theta)
         # compute composite good price
         p_i = (
diff --git a/ogcore/utils.py b/ogcore/utils.py
index 7be02a64e..85fe21147 100644
--- a/ogcore/utils.py
+++ b/ogcore/utils.py
@@ -158,7 +158,6 @@ def comp_array(name, a, b, tol, unequal, exceptions={}, relative=False):
         return False
 
     else:
-
         if np.all(a < EPSILON) and np.all(b < EPSILON):
             return True
 
diff --git a/tests/test_household.py b/tests/test_household.py
index f237b79c9..4256c038d 100644
--- a/tests/test_household.py
+++ b/tests/test_household.py
@@ -994,7 +994,6 @@ def test_get_y():
     "bssmat,nssmat,cssmat,ltilde", test_data, ids=["passing", "failing"]
 )
 def test_constraint_checker_SS(bssmat, nssmat, cssmat, ltilde):
-
     household.constraint_checker_SS(bssmat, nssmat, cssmat, ltilde)
     assert True
 
@@ -1003,7 +1002,6 @@ def test_constraint_checker_SS(bssmat, nssmat, cssmat, ltilde):
     "bssmat,nssmat,cssmat,ltilde", test_data, ids=["passing", "failing"]
 )
 def test_constraint_checker_TPI(bssmat, nssmat, cssmat, ltilde):
-
     household.constraint_checker_TPI(bssmat, nssmat, cssmat, 10, ltilde)
     assert True
 
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 4bbf61f0d..354385c5b 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -702,7 +702,6 @@ def test_not_connected_true():
     "df,output_type,precision", test_data, ids=["tex", "json", "html"]
 )
 def test_save_return_table(df, output_type, precision):
-
     test_str = utils.save_return_table(df, output_type, None, precision)
     assert isinstance(test_str, str)