diff --git a/django_prometheus/tests/end2end/testapp/settings.py b/django_prometheus/tests/end2end/testapp/settings.py
index 0630721..bd2190a 100644
--- a/django_prometheus/tests/end2end/testapp/settings.py
+++ b/django_prometheus/tests/end2end/testapp/settings.py
@@ -53,33 +53,6 @@ DATABASES = {
         "ENGINE": "django_prometheus.db.backends.sqlite3",
         "NAME": "db.sqlite3",
     },
-    # Comment this to not test django_prometheus.db.backends.postgres.
-    "postgresql": {
-        "ENGINE": "django_prometheus.db.backends.postgresql",
-        "NAME": "postgres",
-        "USER": "postgres",
-        "PASSWORD": "",
-        "HOST": "localhost",
-        "PORT": "5432",
-    },
-    # Comment this to not test django_prometheus.db.backends.postgis.
-    "postgis": {
-        "ENGINE": "django_prometheus.db.backends.postgis",
-        "NAME": "postgis",
-        "USER": "postgres",
-        "PASSWORD": "",
-        "HOST": "localhost",
-        "PORT": "5432",
-    },
-    # Comment this to not test django_prometheus.db.backends.mysql.
-    "mysql": {
-        "ENGINE": "django_prometheus.db.backends.mysql",
-        "NAME": "django_prometheus_1",
-        "USER": "travis",
-        "PASSWORD": "",
-        "HOST": "localhost",
-        "PORT": "3306",
-    },
     # The following databases are used by test_db.py only
     "test_db_1": {
         "ENGINE": "django_prometheus.db.backends.sqlite3",