diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 5d4254c..8489f55 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,6 +17,12 @@ repos:
       - id: check-added-large-files
         args: ["--maxkb=5000"]
 
+  - repo: https://github.com/ikamensh/flynt
+    rev: 1.0.1
+    hooks:
+      - id: flynt
+        args: ["--fail-on-change"]
+
   - repo: https://github.com/psf/black
     rev: 23.12.1
     hooks:
@@ -27,12 +33,6 @@ repos:
     hooks:
       - id: isort
 
-  - repo: https://github.com/ikamensh/flynt
-    rev: 1.0.1
-    hooks:
-      - id: flynt
-        args: ["--fail-on-change"]
-
   - repo: https://github.com/PyCQA/docformatter
     rev: v1.7.5
     hooks:
diff --git a/climateset/processing/raw/checker.py b/climateset/processing/raw/checker.py
index 037bd8c..01df48c 100644
--- a/climateset/processing/raw/checker.py
+++ b/climateset/processing/raw/checker.py
@@ -287,9 +287,8 @@ def check_variables(self):
             if actual_var != named_var:
                 self.results["var_ok"] = False
                 LOGGER.warning(
-                    "The following file contains the variable {}, but the variable {} was expected: \n{}".format(
-                        actual_var, named_var, self.input_file
-                    )
+                    f"The following file contains the variable {actual_var}, but the variable {named_var} "
+                    f"was expected: \n{self.input_file}"
                 )
             else:
                 self.results["var_ok"] = True
@@ -337,9 +336,8 @@ def check_resolution(self):
             if actual_spat_res != named_spat_res:
                 self.results["res_ok"] = False
                 LOGGER.warning(
-                    "The following file has the nominal resolution {}, but the resolution {} was expected: \n{}".format(
-                        actual_spat_res, named_spat_res, self.input_file
-                    )
+                    f"The following file has the nominal resolution {actual_spat_res}, but the resolution "
+                    f"{named_spat_res} was expected: \n{self.input_file}"
                 )
             else:
                 self.results["res_ok"] = True
@@ -349,9 +347,8 @@ def check_resolution(self):
             if actual_temp_res != named_temp_res:
                 self.dataset["freq_ok"] = False
                 LOGGER.warning(
-                    "The following file has the temporal frequency {}, but the frequency {} was expected: \n{}".format(
-                        actual_temp_res, named_temp_res, self.input_file
-                    )
+                    f"The following file has the temporal frequency {actual_temp_res}, but the frequency "
+                    f"{named_temp_res} was expected: \n{self.input_file}"
                 )
             else:
                 self.dataset["freq_ok"] = True
@@ -377,9 +374,7 @@ def check_units_ok(self):
             if found_unit != expected_unit:
                 self.results["units_ok"] = False
                 LOGGER.warning(
-                    "The following file has the unit {}, but the unit {} was expected: \n{}".format(
-                        found_unit, expected_unit, self.input_file
-                    )
+                    f"The following file has the unit {found_unit}, but the unit {expected_unit} was expected: \n{self.input_file}"
                 )
             else:
                 self.results["units_ok"] = True
diff --git a/noxfile.py b/noxfile.py
index 42460cb..888c791 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -55,9 +55,9 @@ def docformatter(session):
 @nox.session()
 def check(session):
     paths = get_paths(session)
+    session.run("poetry", "run", "flynt", *paths["all"], external=True)
     session.run("poetry", "run", "black", "--check", *paths["all"], external=True)
     session.run("poetry", "run", "isort", *paths["all"], "--check", external=True)
-    session.run("poetry", "run", "flynt", *paths["all"], external=True)
     session.run(
         "poetry",
         "run",
@@ -74,9 +74,9 @@ def check(session):
 @nox.session()
 def fix(session):
     paths = get_paths(session)
+    session.run("poetry", "run", "flynt", *paths["all"], external=True)
     session.run("poetry", "run", "black", *paths["all"], external=True)
     session.run("poetry", "run", "isort", *paths["all"], external=True)
-    session.run("poetry", "run", "flynt", *paths["all"], external=True)
     session.run(
         "poetry",
         "run",