diff --git a/examples/drag_and_drop/main.py b/examples/drag_and_drop/main.py
index cf1c3cb..214d04d 100644
--- a/examples/drag_and_drop/main.py
+++ b/examples/drag_and_drop/main.py
@@ -105,8 +105,7 @@ def on_cells_added_handler(cell_ids):
 
         def on_terminal_changed_handler(cell_id, terminal_type, new_terminal_id, old_terminal_id):
             print(
-                f"{terminal_type} of {cell_id} changed from"
-                f" {old_terminal_id} to {new_terminal_id}"
+                f"{terminal_type} of {cell_id} changed from {old_terminal_id} to {new_terminal_id}"
             )
 
         def on_cells_removed_handler(cell_ids):
diff --git a/scripts/svg_to_stencil.py b/scripts/svg_to_stencil.py
index 8ad623e..969f65e 100644
--- a/scripts/svg_to_stencil.py
+++ b/scripts/svg_to_stencil.py
@@ -301,7 +301,7 @@ def _add_drawing_commands(self, value):
     import argparse
 
     arg_parser = argparse.ArgumentParser(
-        description="Converts a SVG file to a stencil file " "compatible with mxGraph."
+        description="Converts a SVG file to a stencil file compatible with mxGraph."
     )
     arg_parser.add_argument(
         "svg",
diff --git a/setup.py b/setup.py
index 9dbcfdc..0581825 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
     name="qmxgraph",
     use_scm_version=True,
     setup_requires=["setuptools_scm"],
-    description="A Qt graph drawing widget using JavaScript's mxGraph " "library.",
+    description="A Qt graph drawing widget using JavaScript's mxGraph library.",
     long_description=readme + "\n\n" + history,
     author="Rafael Bertoldi",
     author_email="tochaman@gmail.com",
diff --git a/src/qmxgraph/server.py b/src/qmxgraph/server.py
index 642cd04..c5d5163 100644
--- a/src/qmxgraph/server.py
+++ b/src/qmxgraph/server.py
@@ -170,7 +170,7 @@ def host(port, options=None, styles=None, stencils=tuple()):
     for stencil in stencils:
         candidate = os.path.dirname(stencil)
         assert candidate != stencils_path, (
-            "Due to simplification, expects " "all stencils in same folder"
+            "Due to simplification, expects all stencils in same folder"
         )
         stencils_path = candidate
         stencils_.append("stencils/{}".format(os.path.basename(stencil)))
diff --git a/tasks.py b/tasks.py
index 5a15342..b404460 100644
--- a/tasks.py
+++ b/tasks.py
@@ -98,7 +98,7 @@ def create_web_resource(resource_name, src_dir):
 @invoke.task(
     help={
         "python-version": (
-            "Can be used to define the python version used when creating the" " work environment"
+            "Can be used to define the python version used when creating the work environment"
         ),
     }
 )
@@ -380,7 +380,7 @@ def fix_alias(a):
     ]
     if not files:
         raise RuntimeError(
-            "Unable to collect anything for " ".qrc file in folder {}".format(source_dir)
+            "Unable to collect anything for .qrc file in folder {}".format(source_dir)
         )
 
     qrc_filename = os.path.join(target_dir, "{basename}{ext}".format(basename=basename, ext=".qrc"))
diff --git a/tests/conftest.py b/tests/conftest.py
index c1ff37a..f659a51 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -133,7 +133,7 @@ def get(self):
                 os.remove(lock_file)
 
         if attempts == 0:
-            raise IOError("Unable to obtain unique port after " "{} attempts".format(attempts))
+            raise IOError("Unable to obtain unique port after {} attempts".format(attempts))
 
         return port_
 
@@ -962,7 +962,7 @@ def _wait_graph_page_ready(host, selenium):
         )
     except timeout_exceptions as e:
         raise TimeoutException(
-            "Graph page wasn't ready in address {} after a timeout of {}" " seconds".format(
+            "Graph page wasn't ready in address {} after a timeout of {} seconds".format(
                 host.address, timeout
             )
         ) from e