diff --git a/ai-hub/integration_tests/conftest.py b/ai-hub/integration_tests/conftest.py
index 9d90e8c..e6a9a5d 100644
--- a/ai-hub/integration_tests/conftest.py
+++ b/ai-hub/integration_tests/conftest.py
@@ -224,3 +224,17 @@
 def run_around_tests(setup_mesh_environment):
     """Ensure setup runs for all tests."""
     yield
+
+def pytest_addoption(parser):
+    parser.addoption(
+        "--runslow", action="store_true", default=False, help="run slow tests"
+    )
+
+def pytest_collection_modifyitems(config, items):
+    if config.getoption("--runslow"):
+        # --runslow given in cli: do not skip slow tests
+        return
+    skip_slow = pytest.mark.skip(reason="need --runslow option to run")
+    for item in items:
+        if "slow" in item.keywords:
+            item.add_marker(skip_slow)
diff --git a/ai-hub/integration_tests/test_agents.py b/ai-hub/integration_tests/test_agents.py
index 93f5ebe..ea64992 100644
--- a/ai-hub/integration_tests/test_agents.py
+++ b/ai-hub/integration_tests/test_agents.py
@@ -9,6 +9,7 @@
     uid = os.getenv("SYNC_TEST_USER_ID", "")
     return {"X-User-ID": uid}
 
+@pytest.mark.slow
 def test_agent_lifecycle_and_api_coverage():
     """
     Test suite covering Agent API endpoints:
@@ -111,6 +112,7 @@
         # Cleanup Node
         client.delete(f"{BASE_URL}/nodes/admin/{node_id}", params={"admin_id": admin_id})
 
+@pytest.mark.slow
 def test_agent_webhook_trigger():
     """
     Test Agent Webhook Triggering:
@@ -199,6 +201,7 @@
         client.delete(f"{BASE_URL}/agents/{instance_id}", headers=_headers())
         client.delete(f"{BASE_URL}/nodes/admin/{node_id}", params={"admin_id": admin_id})
 
+@pytest.mark.slow
 def test_agent_metrics_reset():
     """
     Test Agent Metrics Tracking and Reset:
diff --git a/ai-hub/integration_tests/test_coworker_flow.py b/ai-hub/integration_tests/test_coworker_flow.py
index 7fb716c..298374c 100644
--- a/ai-hub/integration_tests/test_coworker_flow.py
+++ b/ai-hub/integration_tests/test_coworker_flow.py
@@ -80,6 +80,7 @@
             if instance_id:
                 client.delete(f"{BASE_URL}/agents/{instance_id}", headers=_headers())
 
+@pytest.mark.slow
 def test_coworker_sc3_limit_check():
     """
     SC-3 (Limit Check):
@@ -148,6 +149,7 @@
             if instance_id:
                 client.delete(f"{BASE_URL}/agents/{instance_id}", headers=_headers())
 
+@pytest.mark.slow
 def test_coworker_sc2_rework_loop():
     """
     SC-2 (The Rework Loop):
@@ -205,6 +207,7 @@
         finally:
             if instance_id: client.delete(f"{BASE_URL}/agents/{instance_id}", headers=_headers())
 
+@pytest.mark.slow
 def test_coworker_sc4_context_compaction():
     """
     SC-4 (Context Compaction):
diff --git a/ai-hub/integration_tests/test_coworker_full_journey.py b/ai-hub/integration_tests/test_coworker_full_journey.py
index 71d9b25..e915d5e 100644
--- a/ai-hub/integration_tests/test_coworker_full_journey.py
+++ b/ai-hub/integration_tests/test_coworker_full_journey.py
@@ -9,6 +9,7 @@
     uid = os.getenv("SYNC_TEST_USER_ID", "9a333ccd-9c3f-432f-a030-7b1e1284a436")
     return {"X-User-ID": uid}
 
+@pytest.mark.slow
 def test_coworker_full_journey():
     """
     CO-WORKER FULL JOURNEY INTEGRATION TEST:
diff --git a/ai-hub/integration_tests/test_file_sync.py b/ai-hub/integration_tests/test_file_sync.py
index 353ed1f..7a31bdb 100644
--- a/ai-hub/integration_tests/test_file_sync.py
+++ b/ai-hub/integration_tests/test_file_sync.py
@@ -537,6 +537,7 @@
         pytest.skip(f"Could not restart {container}: {result.stderr}")
 
 
+@pytest.mark.slow
 class TestNodeResync:
     """
     Case 10: node reconnect / workspace resync after container restart.
@@ -606,6 +607,7 @@
 #  LARGE FILE TESTS (20 MB, multi-chunk)
 # ══════════════════════════════════════════════════════════════════════════════
 
+@pytest.mark.slow
 class TestLargeFileSync:
     """Cases 5–8: 20 MB file create + delete in both directions."""
 
@@ -768,6 +770,7 @@
 class TestGigabyteFileSync:
     """Tests synchronizing a 1GB file across the mesh via DD CLI tool."""
 
+    @pytest.mark.slow
     def test_case_1gb_sync_from_client_to_server_and_node(
         self, sync_client, swarm_session
     ):
diff --git a/ai-hub/integration_tests/test_node_registration.py b/ai-hub/integration_tests/test_node_registration.py
index a176b20..8fddb40 100644
--- a/ai-hub/integration_tests/test_node_registration.py
+++ b/ai-hub/integration_tests/test_node_registration.py
@@ -16,6 +16,7 @@
 import time
 
 @pytest.mark.skipif(os.getenv("SKIP_DOCKER_NODES", "false").lower() == "true", reason="Node Lifecycle integration test requires Docker to spawn nodes imperatively.")
+@pytest.mark.slow
 def test_node_full_lifecycle_and_api_coverage():
     user_id = _get_user_id()
     node_id = f"test-integration-node-{uuid.uuid4().hex[:8]}"
diff --git a/ai-hub/integration_tests/test_parallel_coworker.py b/ai-hub/integration_tests/test_parallel_coworker.py
index 930302c..cc30e5c 100644
--- a/ai-hub/integration_tests/test_parallel_coworker.py
+++ b/ai-hub/integration_tests/test_parallel_coworker.py
@@ -8,6 +8,7 @@
     uid = os.getenv("SYNC_TEST_USER_ID", "")
     return {"X-User-ID": uid}
 
+@pytest.mark.slow
 def test_parallel_rubric_generation():
     """
     Verifies that rubric generation and main agent execution happen in parallel.
diff --git a/ai-hub/pytest.ini b/ai-hub/pytest.ini
index 3515664..b1de605 100644
--- a/ai-hub/pytest.ini
+++ b/ai-hub/pytest.ini
@@ -5,4 +5,5 @@
     tests
     integration_tests
 markers =
-    requires_nodes: marker for integration tests that require live agent nodes
\ No newline at end of file
+    requires_nodes: marker for integration tests that require live agent nodes
+    slow: marker for slow integration tests (LLM calls, large file sync)
\ No newline at end of file