diff --git a/backend/alembic/versions/70d75bc52042_transactions_table.py b/backend/alembic/versions/70d75bc52042_transactions_table.py
index 2c5cde0..1578532 100644
--- a/backend/alembic/versions/70d75bc52042_transactions_table.py
+++ b/backend/alembic/versions/70d75bc52042_transactions_table.py
@@ -21,10 +21,11 @@
 def upgrade() -> None:
     """Upgrade schema."""
     # ### commands auto generated by Alembic - please adjust! ###
-    op.drop_table('events')
-    op.drop_table('sessions')
-    op.drop_table('user_states')
-    op.drop_table('app_states')
+    conn = op.get_bind()
+    existing = sa.inspect(conn).get_table_names()
+    for tbl in ('events', 'sessions', 'user_states', 'app_states'):
+        if tbl in existing:
+            op.drop_table(tbl)
     with op.batch_alter_table('payment_transactions', schema=None) as batch_op:
         batch_op.add_column(sa.Column('transaction_metadata', sa.JSON(), nullable=True))
         batch_op.drop_column('metadata')
diff --git a/backend/alembic/versions/dae11b7e812a_add_webhook_payload_field.py b/backend/alembic/versions/dae11b7e812a_add_webhook_payload_field.py
index 0433d94..c9f3540 100644
--- a/backend/alembic/versions/dae11b7e812a_add_webhook_payload_field.py
+++ b/backend/alembic/versions/dae11b7e812a_add_webhook_payload_field.py
@@ -21,10 +21,11 @@
 def upgrade() -> None:
     """Upgrade schema."""
     # ### commands auto generated by Alembic - please adjust! ###
-    op.drop_table('user_states')
-    op.drop_table('app_states')
-    op.drop_table('events')
-    op.drop_table('sessions')
+    conn = op.get_bind()
+    existing = sa.inspect(conn).get_table_names()
+    for tbl in ('user_states', 'app_states', 'events', 'sessions'):
+        if tbl in existing:
+            op.drop_table(tbl)
     with op.batch_alter_table('payment_transactions', schema=None) as batch_op:
         batch_op.add_column(sa.Column('raw_webhook_payload', sa.JSON(), nullable=True))
 
diff --git a/frontend/tsconfig.json b/frontend/tsconfig.json
index 864182e..348b3b7 100644
--- a/frontend/tsconfig.json
+++ b/frontend/tsconfig.json
@@ -31,5 +31,5 @@
     ".next/dev/types/**/*.ts",
     "**/*.mts"
   ],
-  "exclude": ["node_modules"]
+  "exclude": ["node_modules", "tests"]
 }