diff --git a/tests/test_db.py b/tests/test_db.py
index 68ae2c1..17460d7 100644
--- a/tests/test_db.py
+++ b/tests/test_db.py
@@ -1,12 +1,7 @@
-import datetime
-
 import pytest
 from sqlalchemy import func
 
 from amanuensis.db import *
-import amanuensis.backend.lexicon as lexiq
-import amanuensis.backend.user as userq
-from amanuensis.errors import ArgumentError
 
 
 @pytest.fixture
@@ -27,77 +22,3 @@ def test_create(db):
     assert db.session.query(func.count(ArticleIndexRule.id)).scalar() == 0
     assert db.session.query(func.count(ArticleContentRule.id)).scalar() == 0
     assert db.session.query(func.count(Post.id)).scalar() == 0
-
-
-def test_create_user(db):
-    """Test new user creation."""
-    kwargs = {
-        'username': 'username',
-        'password': 'password',
-        'display_name': 'User Name',
-        'email': 'user@example.com',
-        'is_site_admin': False
-    }
-
-    # Test length constraints
-    with pytest.raises(ArgumentError):
-        userq.create_user(db, **{**kwargs, 'username': 'me'})
-    with pytest.raises(ArgumentError):
-        userq.create_user(db, **{**kwargs, 'username': 'the right honorable user-name, esquire'})
-    # Test allowed characters
-    with pytest.raises(ArgumentError):
-        userq.create_user(db, **{**kwargs, 'username': 'user name'})
-    # No password
-    with pytest.raises(ArgumentError):
-        userq.create_user(db, **{**kwargs, 'password': None})
-
-    # Valid creation works and populates fields
-    new_user = userq.create_user(db, **kwargs)
-    assert new_user
-    assert new_user.id is not None
-    assert new_user.created is not None
-
-    # No duplicate usernames
-    with pytest.raises(ArgumentError):
-        duplicate = userq.create_user(db, **kwargs)
-
-    # Missing display name populates with username
-    user2_kw = {**kwargs, 'username': 'user2', 'display_name': None}
-    user2 = userq.create_user(db, **user2_kw)
-    assert user2.display_name is not None
-
-
-def test_create_lexicon(db):
-    """Test new game creation."""
-    kwargs = {
-        'name': 'Test',
-        'title': None,
-        'prompt': 'A test Lexicon game'
-    }
-    # Test name constraints
-    with pytest.raises(ArgumentError):
-        lexiq.create_lexicon(db, **{**kwargs, 'name': None})
-    with pytest.raises(ArgumentError):
-        lexiq.create_lexicon(db, **{**kwargs, 'name': ''})
-    with pytest.raises(ArgumentError):
-        lexiq.create_lexicon(db, **{**kwargs, 'name': ' '})
-    with pytest.raises(ArgumentError):
-        lexiq.create_lexicon(db, **{**kwargs, 'name': '..'})
-    with pytest.raises(ArgumentError):
-        lexiq.create_lexicon(db, **{**kwargs, 'name': '\x00'})
-    with pytest.raises(ArgumentError):
-        lexiq.create_lexicon(db, **{**kwargs, 'name': 'space in name'})
-
-    # Validate that creation populates fields, including timestamps
-    before = datetime.datetime.utcnow() - datetime.timedelta(seconds=1)
-    new_lexicon = lexiq.create_lexicon(db, **kwargs)
-    after = datetime.datetime.utcnow() + datetime.timedelta(seconds=1)
-    assert new_lexicon
-    assert new_lexicon.id is not None
-    assert new_lexicon.created is not None
-    assert before < new_lexicon.created
-    assert new_lexicon.created < after
-
-    # No duplicate lexicon names
-    with pytest.raises(ArgumentError):
-        duplicate = lexiq.create_lexicon(db, **kwargs)
diff --git a/tests/test_lexicon.py b/tests/test_lexicon.py
new file mode 100644
index 0000000..15c46c5
--- /dev/null
+++ b/tests/test_lexicon.py
@@ -0,0 +1,45 @@
+import datetime
+
+import pytest
+
+from amanuensis.db import *
+import amanuensis.backend.lexicon as lexiq
+from amanuensis.errors import ArgumentError
+
+from .test_db import db
+
+
+def test_create_lexicon(db):
+    """Test new game creation."""
+    kwargs = {
+        'name': 'Test',
+        'title': None,
+        'prompt': 'A test Lexicon game'
+    }
+    # Test name constraints
+    with pytest.raises(ArgumentError):
+        lexiq.create_lexicon(db, **{**kwargs, 'name': None})
+    with pytest.raises(ArgumentError):
+        lexiq.create_lexicon(db, **{**kwargs, 'name': ''})
+    with pytest.raises(ArgumentError):
+        lexiq.create_lexicon(db, **{**kwargs, 'name': ' '})
+    with pytest.raises(ArgumentError):
+        lexiq.create_lexicon(db, **{**kwargs, 'name': '..'})
+    with pytest.raises(ArgumentError):
+        lexiq.create_lexicon(db, **{**kwargs, 'name': '\x00'})
+    with pytest.raises(ArgumentError):
+        lexiq.create_lexicon(db, **{**kwargs, 'name': 'space in name'})
+
+    # Validate that creation populates fields, including timestamps
+    before = datetime.datetime.utcnow() - datetime.timedelta(seconds=1)
+    new_lexicon = lexiq.create_lexicon(db, **kwargs)
+    after = datetime.datetime.utcnow() + datetime.timedelta(seconds=1)
+    assert new_lexicon
+    assert new_lexicon.id is not None
+    assert new_lexicon.created is not None
+    assert before < new_lexicon.created
+    assert new_lexicon.created < after
+
+    # No duplicate lexicon names
+    with pytest.raises(ArgumentError):
+        duplicate = lexiq.create_lexicon(db, **kwargs)
diff --git a/tests/test_user.py b/tests/test_user.py
new file mode 100644
index 0000000..8c2b9c3
--- /dev/null
+++ b/tests/test_user.py
@@ -0,0 +1,53 @@
+import pytest
+
+from amanuensis.db import *
+import amanuensis.backend.lexicon as lexiq
+import amanuensis.backend.user as userq
+from amanuensis.errors import ArgumentError
+
+from .test_db import db
+
+
+@pytest.fixture
+def db():
+    db = DbContext('sqlite:///:memory:', debug=True)
+    db.create_all()
+    return db
+
+
+def test_create_user(db):
+    """Test new user creation."""
+    kwargs = {
+        'username': 'username',
+        'password': 'password',
+        'display_name': 'User Name',
+        'email': 'user@example.com',
+        'is_site_admin': False
+    }
+
+    # Test length constraints
+    with pytest.raises(ArgumentError):
+        userq.create_user(db, **{**kwargs, 'username': 'me'})
+    with pytest.raises(ArgumentError):
+        userq.create_user(db, **{**kwargs, 'username': 'the right honorable user-name, esquire'})
+    # Test allowed characters
+    with pytest.raises(ArgumentError):
+        userq.create_user(db, **{**kwargs, 'username': 'user name'})
+    # No password
+    with pytest.raises(ArgumentError):
+        userq.create_user(db, **{**kwargs, 'password': None})
+
+    # Valid creation works and populates fields
+    new_user = userq.create_user(db, **kwargs)
+    assert new_user
+    assert new_user.id is not None
+    assert new_user.created is not None
+
+    # No duplicate usernames
+    with pytest.raises(ArgumentError):
+        duplicate = userq.create_user(db, **kwargs)
+
+    # Missing display name populates with username
+    user2_kw = {**kwargs, 'username': 'user2', 'display_name': None}
+    user2 = userq.create_user(db, **user2_kw)
+    assert user2.display_name is not None