diff --git a/.github/workflows/cicd.yaml b/.github/workflows/cicd.yaml
index 37bb5aa..17162af 100644
--- a/.github/workflows/cicd.yaml
+++ b/.github/workflows/cicd.yaml
@@ -101,7 +101,7 @@ jobs:
           PGDATABASE: postgis
           APP_HOST: 0.0.0.0
           APP_PORT: 8080
-          ENABLED_EXTENSIONS: transaction,bulk_transactions,query,sort,fields,filter,pagination,collection_search
+          ENABLE_TRANSACTIONS_EXTENSIONS: TRUE
 
   test-docs:
     runs-on: ubuntu-latest
diff --git a/docker-compose.yml b/docker-compose.yml
index 0186bb7..962aa2e 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -21,7 +21,7 @@ services:
       - DB_MIN_CONN_SIZE=1
       - DB_MAX_CONN_SIZE=1
       - USE_API_HYDRATE=${USE_API_HYDRATE:-false}
-      - ENABLED_EXTENSIONS=transaction,bulk_transactions,query,sort,fields,filter,pagination,collection_search
+      - ENABLE_TRANSACTIONS_EXTENSIONS=TRUE
     ports:
       - "8082:8082"
     volumes:
diff --git a/stac_fastapi/pgstac/app.py b/stac_fastapi/pgstac/app.py
index 8b8861d..d19a71e 100644
--- a/stac_fastapi/pgstac/app.py
+++ b/stac_fastapi/pgstac/app.py
@@ -95,8 +95,7 @@
 
 application_extensions = []
 
-# transaction extensions
-if "transaction" in enabled_extensions:
+if os.environ.get("ENABLE_TRANSACTIONS_EXTENSIONS", "").lower() in ["yes", "true", "1"]:
     application_extensions.append(
         TransactionExtension(
             client=TransactionsClient(),
@@ -105,7 +104,6 @@
         ),
     )
 
-if "bulk_transactions" in enabled_extensions:
     application_extensions.append(
         BulkTransactionExtension(client=BulkTransactionsClient()),
     )
diff --git a/tests/api/test_api.py b/tests/api/test_api.py
index e4aeb62..9185a79 100644
--- a/tests/api/test_api.py
+++ b/tests/api/test_api.py
@@ -69,11 +69,13 @@
 
 
 async def test_default_app_no_transactions(
-    default_app_client, load_test_data, load_test_collection
+    app_client_no_transaction, load_test_data, load_test_collection
 ):
     coll = load_test_collection
     item = load_test_data("test_item.json")
-    resp = await default_app_client.post(f"/collections/{coll['id']}/items", json=item)
+    resp = await app_client_no_transaction.post(
+        f"/collections/{coll['id']}/items", json=item
+    )
 
     # the default application does not have the transaction extensions enabled!
     assert resp.status_code == 405
@@ -903,3 +905,40 @@ async def test_no_extension(
 
     finally:
         await close_db_connection(app)
+
+
+async def test_default_app(default_client, default_app, load_test_data):
+    api_routes = {
+        f"{list(route.methods)[0]} {route.path}" for route in default_app.routes
+    }
+    assert set(STAC_CORE_ROUTES).issubset(api_routes)
+    assert set(STAC_TRANSACTION_ROUTES).issubset(api_routes)
+
+    # Load collections
+    col = load_test_data("test_collection.json")
+    resp = await default_client.post("/collections", json=col)
+    assert resp.status_code == 201
+
+    # Load items
+    item = load_test_data("test_item.json")
+    resp = await default_client.post(f"/collections/{col['id']}/items", json=item)
+    assert resp.status_code == 201
+
+    resp = await default_client.get("/conformance")
+    assert resp.status_code == 200
+    conf = resp.json()["conformsTo"]
+    assert (
+        "https://api.stacspec.org/v1.0.0/ogcapi-features/extensions/transaction" in conf
+    )
+    assert "https://api.stacspec.org/v1.0.0/collections/extensions/transaction" in conf
+    assert "http://www.opengis.net/spec/cql2/1.0/conf/basic-cql2" in conf
+    assert "http://www.opengis.net/spec/ogcapi-common-2/1.0/conf/simple-query" in conf
+    assert "http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/core" in conf
+    assert (
+        "http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/features-filter" in conf
+    )
+    assert "http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/filter" in conf
+    assert "https://api.stacspec.org/v1.0.0-rc.1/collection-search" in conf
+    assert "https://api.stacspec.org/v1.0.0/collections" in conf
+    assert "https://api.stacspec.org/v1.0.0/ogcapi-features#query" in conf
+    assert "https://api.stacspec.org/v1.0.0/ogcapi-features#sort" in conf
diff --git a/tests/conftest.py b/tests/conftest.py
index 18298bf..397ecec 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -330,7 +330,7 @@ async def app_client_no_ext(app_no_ext):
 
 
 @pytest.fixture(scope="function")
-async def default_app(database):
+async def app_no_transaction(database):
     """Default stac-fastapi-pgstac application without any extensions."""
     api_settings = Settings(testing=True)
     api = StacApi(
@@ -358,8 +358,38 @@ async def default_app(database):
 
 
 @pytest.fixture(scope="function")
-async def default_app_client(default_app):
+async def app_client_no_transaction(app_no_transaction):
     logger.info("creating app_client")
+    async with AsyncClient(
+        transport=ASGITransport(app=app_no_transaction), base_url="http://test"
+    ) as c:
+        yield c
+
+
+@pytest.fixture(scope="function")
+async def default_app(database, monkeypatch):
+    """Test default stac-fastapi-pgstac application."""
+    monkeypatch.setenv("POSTGRES_USER", database.user)
+    monkeypatch.setenv("POSTGRES_PASS", database.password)
+    monkeypatch.setenv("POSTGRES_HOST_READER", database.host)
+    monkeypatch.setenv("POSTGRES_HOST_WRITER", database.host)
+    monkeypatch.setenv("POSTGRES_PORT", str(database.port))
+    monkeypatch.setenv("POSTGRES_DBNAME", database.dbname)
+    monkeypatch.delenv("ENABLED_EXTENSIONS", raising=False)
+
+    monkeypatch.setenv("ENABLE_TRANSACTIONS_EXTENSIONS", "TRUE")
+    monkeypatch.setenv("USE_API_HYDRATE", "TRUE")
+    monkeypatch.setenv("ENABLE_RESPONSE_MODELS", "TRUE")
+
+    from stac_fastapi.pgstac.app import app
+
+    await connect_to_db(app)
+    yield app
+    await close_db_connection(app)
+
+
+@pytest.fixture(scope="function")
+async def default_client(default_app):
     async with AsyncClient(
         transport=ASGITransport(app=default_app), base_url="http://test"
     ) as c: