diff --git a/docs/meshtags.py b/docs/meshtags.py
index 8f3e2f0..caea72b 100644
--- a/docs/meshtags.py
+++ b/docs/meshtags.py
@@ -75,7 +75,7 @@ def verify_meshtags(filename: Path):
             np.testing.assert_allclose(
                 entity_midpoints[i][global_pos],
                 midpoint,
-                err_msg=f"{prefix}: Midpoint ({i , global_pos}) do not match",
+                err_msg=f"{prefix}: Midpoint ({i, global_pos}) do not match",
             )
         print(f"{prefix} Matching of all entities of dimension {i} successful")
 
diff --git a/docs/original_checkpoint.py b/docs/original_checkpoint.py
index 0f25e78..b0a80b7 100644
--- a/docs/original_checkpoint.py
+++ b/docs/original_checkpoint.py
@@ -36,7 +36,7 @@ def create_xdmf_mesh(filename: Path):
     with dolfinx.io.XDMFFile(MPI.COMM_WORLD, filename.with_suffix(".xdmf"), "w") as xdmf:
         xdmf.write_mesh(mesh)
         xdmf.write_meshtags(facet_tag, mesh.geometry)
-    print(f"{mesh.comm.rank+1}/{mesh.comm.size} Mesh written to {filename.with_suffix('.xdmf')}")
+    print(f"{mesh.comm.rank + 1}/{mesh.comm.size} Mesh written to {filename.with_suffix('.xdmf')}")
 
 
 mesh_file = Path("MyMesh.xdmf")
@@ -79,7 +79,7 @@ def write_function(
         name="Output",
     )
     print(
-        f"{mesh.comm.rank+1}/{mesh.comm.size} Function written to ",
+        f"{mesh.comm.rank + 1}/{mesh.comm.size} Function written to ",
         f"{function_filename.with_suffix('.bp')}",
     )
 
diff --git a/docs/time_dependent_mesh.py b/docs/time_dependent_mesh.py
index 21d149d..7625f65 100644
--- a/docs/time_dependent_mesh.py
+++ b/docs/time_dependent_mesh.py
@@ -29,7 +29,7 @@ def compute_volume(mesh, time_stamp):
     vol_local = dolfinx.fem.assemble_scalar(vol_form)
     vol_glob = mesh.comm.allreduce(vol_local, op=MPI.SUM)
     if mesh.comm.rank == 0:
-        print(f"{mesh.comm.rank+1}/{mesh.comm.size} Time: {time_stamp} Mesh Volume: {vol_glob}")
+        print(f"{mesh.comm.rank + 1}/{mesh.comm.size} Time: {time_stamp} Mesh Volume: {vol_glob}")
 
 
 def write_meshes(filename: Path):
diff --git a/tests/create_legacy_checkpoint.py b/tests/create_legacy_checkpoint.py
index 07a8fb7..04006a1 100644
--- a/tests/create_legacy_checkpoint.py
+++ b/tests/create_legacy_checkpoint.py
@@ -21,9 +21,9 @@
 import adios4dolfinx
 
 a4d_version = version("adios4dolfinx")
-assert (
-    a4d_version < "0.7.2"
-), f"Creating a legacy checkpoint requires adios4dolfinx < 0.7.2, you have {a4d_version}."
+assert a4d_version < "0.7.2", (
+    f"Creating a legacy checkpoint requires adios4dolfinx < 0.7.2, you have {a4d_version}."
+)
 
 
 def f(x):