diff --git a/examples/curve-pot.py b/examples/curve-pot.py
index c52799d37430c5defdc033ff88bdce3e54f31d71..c6402352ff940af14d6861714035eae02edfbaed 100644
--- a/examples/curve-pot.py
+++ b/examples/curve-pot.py
@@ -201,7 +201,7 @@ def draw_pot_figure(aspect_ratio,
         mat = build_matrix(op, dtype=np.complex128)
         w, _v = la.eig(mat)
         plt.plot(w.real, "o-")
-        #import sys; sys.exit(0)
+        # import sys; sys.exit(0)
         return
 
         # }}}
diff --git a/pyproject.toml b/pyproject.toml
index c39191d71777ab982b0db0dd5180cf7f833ff129..b4f17271cdd38c45b6bf00dc7bfc909b71feae32 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,9 +26,6 @@ extend-ignore = [
     "UP007", # updated annotations due to __future__ import
     "UP031", # use f-strings instead of %
     "UP032", # use f-strings instead of .format
-
-    # TODO
-    "E265",  # comment format
 ]
 
 [tool.ruff.lint.flake8-quotes]
diff --git a/sumpy/assignment_collection.py b/sumpy/assignment_collection.py
index 204d0fd4f062bfc2a553e2e55e8e0c87ca955a37..d49064555b5a619846a6768d01fb47eeeec2ad4e 100644
--- a/sumpy/assignment_collection.py
+++ b/sumpy/assignment_collection.py
@@ -193,7 +193,7 @@ class SymbolicAssignmentCollection:
         #   Uses maxima to verify.
         # - sym.cse: The sympy thing.
         # - sumpy.cse.cse: Based on sympy, designed to go faster.
-        #from sumpy.symbolic import checked_cse
+        # from sumpy.symbolic import checked_cse
 
         from sumpy.cse import cse
         new_assignments, new_exprs = cse(assign_exprs + extra_exprs,
diff --git a/test/test_qbx.py b/test/test_qbx.py
index 4b9870c4e342c1faf9746b0f4b3e236e296733ec..88c226bc85ee2da18bca6d51980149495e924b48 100644
--- a/test/test_qbx.py
+++ b/test/test_qbx.py
@@ -148,7 +148,7 @@ def test_direct_qbx_vs_eigval_with_tgt_deriv(
         unit_circle = np.array([unit_circle.real, unit_circle.imag])
 
         sigma = np.cos(mode_nr * t)
-        #eigval = 1/(2*mode_nr)
+        # eigval = 1/(2*mode_nr)
         eigval = 0.5
 
         result_ref = eigval * sigma