diff --git a/evap/contributor/views.py b/evap/contributor/views.py
index 9fcac49b35..aa62b74576 100644
--- a/evap/contributor/views.py
+++ b/evap/contributor/views.py
@@ -22,8 +22,8 @@
 )
 from evap.evaluation.tools import (
     AttachmentResponse,
+    get_bool_parameter_from_url_or_session,
     get_object_from_dict_pk_entry_or_logged_40x,
-    get_parameter_from_url_or_session,
     sort_formset,
 )
 from evap.results.exporters import ResultsExporter
@@ -35,7 +35,7 @@
 @responsible_or_contributor_or_delegate_required
 def index(request):
     user = request.user
-    show_delegated = get_parameter_from_url_or_session(request, "show_delegated", True)
+    show_delegated = get_bool_parameter_from_url_or_session(request, "show_delegated", True)
 
     represented_proxy_users = user.represented_users.filter(is_proxy_user=True)
     contributor_visible_states = [
diff --git a/evap/evaluation/tools.py b/evap/evaluation/tools.py
index 45ca866bf5..6dce63cb05 100644
--- a/evap/evaluation/tools.py
+++ b/evap/evaluation/tools.py
@@ -170,7 +170,7 @@ def vote_end_datetime(vote_end_date: datetime.date) -> datetime.datetime:
     return date_to_datetime(vote_end_date) + datetime.timedelta(hours=24 + settings.EVALUATION_END_OFFSET_HOURS)
 
 
-def get_parameter_from_url_or_session(request: HttpRequest, parameter: str, default=False) -> bool:
+def get_bool_parameter_from_url_or_session(request: HttpRequest, parameter: str, default=False) -> bool:
     result_str = request.GET.get(parameter, None)
     if result_str is None:  # if no parameter is given take session value
         result = request.session.get(parameter, default)
@@ -180,7 +180,9 @@ def get_parameter_from_url_or_session(request: HttpRequest, parameter: str, defa
     return result
 
 
-def get_string_from_url_or_session(request: HttpRequest, parameter: str, default: str | None = None) -> str | None:
+def get_string_parameter_from_url_or_session(
+    request: HttpRequest, parameter: str, default: str | None = None
+) -> str | None:
     result = request.GET.get(parameter, None)
     if result is None:
         result = request.session.get(parameter, default)
diff --git a/evap/staff/views.py b/evap/staff/views.py
index 68456792d1..83ff6de5cf 100644
--- a/evap/staff/views.py
+++ b/evap/staff/views.py
@@ -68,9 +68,9 @@
     HttpResponseNoContent,
     SaveValidFormMixin,
     StrOrPromise,
+    get_bool_parameter_from_url_or_session,
     get_object_from_dict_pk_entry_or_logged_40x,
-    get_parameter_from_url_or_session,
-    get_string_from_url_or_session,
+    get_string_parameter_from_url_or_session,
     sort_formset,
     temporary_receiver,
 )
@@ -1825,7 +1825,7 @@ def evaluation_preview(request, evaluation_id):
 @manager_required
 def questionnaire_index(request):
     filters = ["all", "visible", "archived"]
-    filter_questionnaires = get_string_from_url_or_session(request, "filter_questionnaires", filters[0])
+    filter_questionnaires = get_string_parameter_from_url_or_session(request, "filter_questionnaires", filters[0])
     if filter_questionnaires not in filters:
         raise SuspiciousOperation
 
@@ -2323,7 +2323,7 @@ def user_index(request):
 
 @manager_required
 def user_list(request):
-    filter_users = get_parameter_from_url_or_session(request, "filter_users")
+    filter_users = get_bool_parameter_from_url_or_session(request, "filter_users")
 
     users = UserProfile.objects.all()
     if filter_users: