diff --git a/tests/e2e/a2a/test_a2a_agent_e2e.py b/tests/e2e/a2a/test_a2a_agent_e2e.py
index eb61ace238c..823f6b9c001 100644
--- a/tests/e2e/a2a/test_a2a_agent_e2e.py
+++ b/tests/e2e/a2a/test_a2a_agent_e2e.py
@@ -69,6 +69,16 @@ class TestA2AAgentLifecycle:
         assert fetched.agent_name == agent.agent_name
         assert fetched.agent_card_params.protocol_version == "0.3"
 
+    @pytest.mark.covers("other.a2a.register.semver_version_accepted")
+    def test_semver_protocol_version_registers_and_serves(self, client: A2AClient, resources: ResourceManager, scoped_key: str) -> None:
+        agent = _register(client, resources, "0.3.0")
+        assert agent.agent_card_params.protocol_version.startswith("0.3")
+        card = unwrap(client.agent_card(agent.agent_id, scoped_key))
+        assert card.protocol_version.startswith("0.3")
+        result = unwrap(client.send_message(agent.agent_id, scoped_key, _ask("Say hi in one word"))).result
+        assert result is not None
+        assert result.text != ""
+
     @pytest.mark.covers("other.a2a.discovery.proxy_fronted_card")
     def test_discovery_card_is_proxy_fronted(self, client: A2AClient, resources: ResourceManager, scoped_key: str) -> None:
         agent = _register(client, resources, "0.3")
diff --git a/tests/e2e/coverage_registry/other.yaml b/tests/e2e/coverage_registry/other.yaml
index f4d0120e085..63a626caab4 100644
--- a/tests/e2e/coverage_registry/other.yaml
+++ b/tests/e2e/coverage_registry/other.yaml
@@ -30,6 +30,7 @@
 - {id: other.key_mgmt.spend_reset.resets_to_value, module: other, tier: P1, area: auth, assertions: [resets_to_value], source: "key_management_endpoints.py:4841", rationale: "reset_spend resets accumulated spend"}
 - {id: other.a2a.register.persists, module: other, tier: P1, area: a2a, assertions: [persists], source: "agent_endpoints/endpoints.py:325-443", rationale: "POST /v1/agents registers an agent card; GET /v1/agents/{id} reads it back"}
 - {id: other.a2a.register.unsupported_version_rejected, module: other, tier: P1, area: a2a, assertions: [unsupported_version_rejected], source: "agent_endpoints/endpoints.py _validate_protocol_version", rationale: "A card pinning a protocolVersion outside SUPPORTED_A2A_PROTOCOL_VERSIONS is refused with 400"}
+- {id: other.a2a.register.semver_version_accepted, module: other, tier: P1, area: a2a, assertions: [semver_version_accepted], source: "agent_endpoints/endpoints.py _validate_protocol_version", rationale: "A card pinning a patch-level semver like 0.3.0 (what the Google A2A SDK emits) registers and serves as the 0.3 family rather than 400ing; regression guard for the v1.92 report"}
 - {id: other.a2a.discovery.proxy_fronted_card, module: other, tier: P1, area: a2a, assertions: [proxy_fronted_card], source: "agent_endpoints/a2a_endpoints.py get_agent_card", rationale: "/.well-known/agent-card.json serves the proxy url + supportedInterfaces and the LiteLLM virtual-key bearer scheme, not the upstream"}
 - {id: other.a2a.message_send.bridge_invokes, module: other, tier: P1, area: a2a, assertions: [bridge_invokes], source: "a2a_protocol/litellm_completion_bridge/handler.py", rationale: "A2A message/send routes through the completion bridge to a real provider and logs an asend_message spend row"}
 - {id: other.a2a.version.serves_pinned_0_3, module: other, tier: P1, area: a2a, assertions: [serves_pinned_0_3], source: "agent_endpoints/a2a_endpoints.py _served_version", rationale: "An agent pinning 0.3 returns the flat 0.3 message shape (parts on the result)"}