diff --git a/dont-merge/send-traces.py b/dont-merge/send-traces.py
index ad2a04632..8a885bf11 100644
--- a/dont-merge/send-traces.py
+++ b/dont-merge/send-traces.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 """FIXME dummy docstring."""
+
 from __future__ import annotations
 
 import logging
@@ -52,5 +53,5 @@ def main():
 
 
 if __name__ == '__main__':
-    logging.basicConfig(level="INFO")
+    logging.basicConfig(level='INFO')
     main()
diff --git a/ops/tracing/__init__.py b/ops/tracing/__init__.py
index 34feabb88..c94d0274c 100644
--- a/ops/tracing/__init__.py
+++ b/ops/tracing/__init__.py
@@ -16,6 +16,7 @@
 If OTEL guts are installed, real implementation.
 If OTEL deps are missing, ProxyTracer pointing to NoOpTracer, doing nothing.
 """
+
 from __future__ import annotations
 
 import logging
diff --git a/ops/tracing/_fixme.py b/ops/tracing/_fixme.py
index 33037f3e6..fbbb29b93 100644
--- a/ops/tracing/_fixme.py
+++ b/ops/tracing/_fixme.py
@@ -10,6 +10,7 @@
 # ANY KIND, either express or implied. See the License for the specific language
 # governing permissions and limitations under the License.
 """FIXME Docstring."""
+
 from __future__ import annotations
 
 import functools
@@ -609,7 +610,7 @@ def _get_tracer() -> Optional[Tracer]:
                 logger.warning(
                     'Tracer not found in `tracer` context var. '
                     "Verify that you're importing all `charm_tracing` symbols "
-                    "from the same module path. \n"
+                    'from the same module path. \n'
                     'For example, DO'
                     ': `from charms.lib...charm_tracing import foo, bar`. \n'
                     'DONT: \n'
@@ -1115,10 +1116,11 @@ def trace_function(function: _F, name: Optional[str] = None) -> _F:
     return _trace_callable(function, 'function', name=name)
 
 
-def _trace_callable(callable: _F,  # noqa: A002  # FIXME callable is a builtin
-                    qualifier: str,
-                    name: Optional[str] = None,
-                    ) -> _F:
+def _trace_callable(
+    callable: _F,  # noqa: A002  # FIXME callable is a builtin
+    qualifier: str,
+    name: Optional[str] = None,
+) -> _F:
     dev_logger.debug(f'instrumenting {callable}')
 
     # sig = inspect.signature(callable)