diff --git a/tests/litellm/proxy/test_routing_group_types.py b/tests/litellm/proxy/test_routing_group_types.py
new file mode 100644
index 00000000000..c31577c6d4e
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+++ b/tests/litellm/proxy/test_routing_group_types.py
@@ -0,0 +1,122 @@
+"""
+Unit tests for Routing Group Pydantic types.
+"""
+from litellm.types.router import (
+    DeploymentTrafficStats,
+    FailureInjectionConfig,
+    RoutingGroupConfig,
+    RoutingGroupDeployment,
+    RoutingGroupSimulationResult,
+    RoutingTrace,
+)
+
+
+def test_routing_group_deployment_basic():
+    d = RoutingGroupDeployment(
+        model_id="test-id",
+        model_name="nebius/meta-llama/Llama-3.3-70B",
+        provider="nebius",
+    )
+    assert d.priority is None
+    assert d.weight is None
+
+
+def test_routing_group_deployment_with_priority():
+    d = RoutingGroupDeployment(
+        model_id="test-id",
+        model_name="nebius/meta-llama/Llama-3.3-70B",
+        provider="nebius",
+        priority=1,
+    )
+    assert d.priority == 1
+
+
+def test_routing_group_config_basic():
+    config = RoutingGroupConfig(
+        routing_group_name="test-group",
+        routing_strategy="priority-failover",
+        deployments=[
+            RoutingGroupDeployment(
+                model_id="id-1",
+                model_name="nebius/meta-llama/Llama-3.3-70B",
+                provider="nebius",
+                priority=1,
+            ),
+            RoutingGroupDeployment(
+                model_id="id-2",
+                model_name="fireworks_ai/llama-v3p3-70b",
+                provider="fireworks_ai",
+                priority=2,
+            ),
+        ],
+    )
+    assert config.routing_group_name == "test-group"
+    assert len(config.deployments) == 2
+    assert config.is_active is True
+    assert config.routing_group_id is None
+
+
+def test_routing_group_config_weighted():
+    config = RoutingGroupConfig(
+        routing_group_name="weighted-group",
+        routing_strategy="weighted",
+        deployments=[
+            RoutingGroupDeployment(
+                model_id="id-1",
+                model_name="nebius/meta-llama/Llama-3.3-70B",
+                provider="nebius",
+                weight=80,
+            ),
+            RoutingGroupDeployment(
+                model_id="id-2",
+                model_name="azure/gpt-4o",
+                provider="azure",
+                weight=20,
+            ),
+        ],
+    )
+    assert config.routing_strategy == "weighted"
+
+
+def test_routing_trace():
+    trace = RoutingTrace(
+        deployment_id="id-1",
+        deployment_name="nebius/meta-llama/Llama-3.3-70B",
+        provider="nebius",
+        latency_ms=149.5,
+        was_fallback=False,
+        status="success",
+    )
+    assert trace.fallback_depth == 0
+    assert trace.error_message is None
+
+
+def test_routing_group_simulation_result():
+    result = RoutingGroupSimulationResult(
+        total_requests=100,
+        successful_requests=98,
+        failed_requests=2,
+        avg_latency_ms=169.0,
+        fallback_count=5,
+        traffic_distribution=[
+            DeploymentTrafficStats(
+                deployment_id="id-1",
+                deployment_name="Nebius",
+                provider="nebius",
+                request_count=85,
+                success_count=85,
+                failure_count=0,
+                avg_latency_ms=149.0,
+                percent_of_total=85.0,
+            )
+        ],
+    )
+    assert result.total_requests == 100
+    assert result.flow_data is None
+
+
+def test_failure_injection_config():
+    config = FailureInjectionConfig(
+        deployment_failure_rates={"id-1": 0.5, "id-2": 0.1}
+    )
+    assert config.deployment_failure_rates["id-1"] == 0.5