diff --git a/config/urls.py b/config/urls.py
index 06b2236..212ac1d 100644
--- a/config/urls.py
+++ b/config/urls.py
@@ -23,8 +23,8 @@ urlpatterns = [
     path('login', login),
     path('logout', logout),
     path('register', register),
-    path('users', include("users.urls")),
-    path('questions', include("questions.urls")),
-    path('answers', include("answers.urls")),
-    path('tests', include("trials.urls")),
+    path('users/', include("users.urls")),
+    path('questions/', include("questions.urls")),
+    path('answers/', include("answers.urls")),
+    path('tests/', include("trials.urls")),
 ]
diff --git a/trials/migrations/0003_test_category.py b/trials/migrations/0003_test_category.py
new file mode 100644
index 0000000..b0c89df
--- /dev/null
+++ b/trials/migrations/0003_test_category.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.9 on 2021-12-11 22:03
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('trials', '0002_test_passing_score'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='test',
+            name='category',
+            field=models.CharField(default='', max_length=100),
+        ),
+    ]
diff --git a/trials/models.py b/trials/models.py
index 014c00c..3292fb6 100644
--- a/trials/models.py
+++ b/trials/models.py
@@ -3,6 +3,7 @@ from django.db import models
 
 class Test(models.Model):
     name = models.CharField(max_length=100)
+    category = models.CharField(max_length=100, default="")
     passing_score = models.PositiveSmallIntegerField(default=0)
 
     def get_score(self, answers):