diff --git a/nf_core/components/create.py b/nf_core/components/create.py
index d2169e3a72..6c9c01b496 100644
--- a/nf_core/components/create.py
+++ b/nf_core/components/create.py
@@ -394,7 +394,7 @@ def _get_component_dirs(self):
             if self.component_type == "modules":
                 file_paths["environment.yml"] = component_dir / "environment.yml"
             file_paths["tests/tags.yml"] = component_dir / "tests" / "tags.yml"
-            file_paths["tests/main.nf.test"] = component_dir / "tests" / "main.nf.test"
+            file_paths["tests/main.nf.test.j2"] = component_dir / "tests" / "main.nf.test"
 
         return file_paths
 
diff --git a/nf_core/module-template/tests/main.nf.test b/nf_core/module-template/tests/main.nf.test.j2
similarity index 100%
rename from nf_core/module-template/tests/main.nf.test
rename to nf_core/module-template/tests/main.nf.test.j2
diff --git a/nf_core/subworkflow-template/tests/main.nf.test b/nf_core/subworkflow-template/tests/main.nf.test.j2
similarity index 100%
rename from nf_core/subworkflow-template/tests/main.nf.test
rename to nf_core/subworkflow-template/tests/main.nf.test.j2
diff --git a/nf_core/utils.py b/nf_core/utils.py
index 461f5a9bad..4271e971a1 100644
--- a/nf_core/utils.py
+++ b/nf_core/utils.py
@@ -548,7 +548,7 @@ def safe_get(self, url):
             else:
                 return r
         elif request.status_code in self.return_unauthorised:
-            raise RuntimeError(f"GitHub API PR failed, probably due to an expired GITHUB_TOKEN.")
+            raise RuntimeError("GitHub API PR failed, probably due to an expired GITHUB_TOKEN.")
 
         return request