diff --git a/pkgs/by-name/mi/mistral-vibe/package.nix b/pkgs/by-name/mi/mistral-vibe/package.nix
index 2232c734b765..f413a002c9b4 100644
--- a/pkgs/by-name/mi/mistral-vibe/package.nix
+++ b/pkgs/by-name/mi/mistral-vibe/package.nix
@@ -151,6 +151,9 @@ python3Packages.buildPythonApplication (finalAttrs: {
   versionCheckKeepEnvironment = [ "HOME" ];
 
   disabledTests = [
+    # The finite stdio input closes before all responses are flushed in the sandbox.
+    "test_stdio_server_uses_the_same_json_rpc_lifecycle"
+
     # AssertionError: assert <MCPSourceStatus.UNAVAILABLE: 'unavailable'> is <MCPSourceStatus.ENABLED: 'enabled'>
     "test_mcp_catalog_read_refresh_toggle_remove_and_compatibility_aliases"
 
@@ -159,9 +162,6 @@ python3Packages.buildPythonApplication (finalAttrs: {
     "test_aclose_terminates_real_subprocess"
     "test_persists_real_subprocess_state_across_calls"
 
-    # AssertionError: assert '32:2617357:1782120467963161870:7' != '32:2617357:1782120467963161870:7'
-    "test_changes_when_file_changes"
-
     # vibe.core.llm.exceptions.BackendError: LLM backend error [mock-provider]
     # reason: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Missing Authority Key Identifier (_ssl.c:1032)
     "test_generic_backend_streaming_uses_ssl_cert_file"
@@ -188,10 +188,7 @@ python3Packages.buildPythonApplication (finalAttrs: {
   ];
 
   disabledTestPaths = [
-    # This tests the install_script and fails. This is not relevant for nixpkgs.
-    "tests/test_install_script.py"
-
-    # All snapshot tests fail with AssertionError
+    # All snapshot tests use syrupy 4.8.0, which is not packaged here.
     "tests/snapshots/"
 
     # These tests invoke uv run and fail to import the packaged pydantic extension.
diff --git a/pkgs/development/python-modules/agent-client-protocol/default.nix b/pkgs/development/python-modules/agent-client-protocol/default.nix
index 36c8d4a1d56c..be7a56f36f30 100644
--- a/pkgs/development/python-modules/agent-client-protocol/default.nix
+++ b/pkgs/development/python-modules/agent-client-protocol/default.nix
@@ -10,16 +10,20 @@
   pydantic,
 
   # optional-dependencies
+  h2,
+  httpx,
   opentelemetry-sdk,
+  websockets,
 
   # tests
   pytest-asyncio,
   pytestCheckHook,
+  uvicorn,
 }:
 
 buildPythonPackage (finalAttrs: {
   pname = "agent-client-protocol";
-  version = "0.12.0";
+  version = "0.12.1";
   pyproject = true;
   __structuredAttrs = true;
 
@@ -27,7 +31,7 @@ buildPythonPackage (finalAttrs: {
     owner = "agentclientprotocol";
     repo = "python-sdk";
     tag = finalAttrs.version;
-    hash = "sha256-IJJ4zgwkLP7CnU330X1K6p/We3A+tm/Veu64C2XhPS8=";
+    hash = "sha256-GBMzhDHOiXGQDyHtDEBpGL4SH/I16Zh/QMePhiLHJSE=";
   };
 
   build-system = [
@@ -39,6 +43,11 @@ buildPythonPackage (finalAttrs: {
   ];
 
   optional-dependencies = {
+    http = [
+      h2
+      httpx
+      websockets
+    ];
     logfire = [
       # logfire (unpackaged)
       opentelemetry-sdk
@@ -50,18 +59,15 @@ buildPythonPackage (finalAttrs: {
   nativeCheckInputs = [
     pytest-asyncio
     pytestCheckHook
-  ];
+    uvicorn
+  ]
+  ++ finalAttrs.passthru.optional-dependencies.http;
 
   disabledTests = [
-    # Hangs forever
+    # Agent subprocess cannot complete in the sandbox.
     "test_spawn_agent_process_roundtrip"
   ];
 
-  disabledTestPaths = [
-    # Optional HTTP transport dependencies are not packaged here.
-    "tests/http"
-  ];
-
   __darwinAllowLocalNetworking = true;
 
   meta = {
diff --git a/pkgs/development/python-modules/mistralai/default.nix b/pkgs/development/python-modules/mistralai/default.nix
index 9afe33e5ecbb..56e9cf455aa4 100644
--- a/pkgs/development/python-modules/mistralai/default.nix
+++ b/pkgs/development/python-modules/mistralai/default.nix
@@ -21,11 +21,14 @@
   griffe,
   mcp,
   google-auth,
+  msgpack,
   requests,
   websockets,
+  zstandard,
   opentelemetry-exporter-otlp-proto-http,
 
   # tests
+  opentelemetry-instrumentation-httpx,
   opentelemetry-sdk,
   pytest-asyncio,
   pytestCheckHook,
@@ -83,26 +86,31 @@ buildPythonPackage (finalAttrs: {
       opentelemetry-sdk
       opentelemetry-exporter-otlp-proto-http
     ];
+    workflow_payload_compression = [
+      msgpack
+      zstandard
+    ];
   };
 
   pythonImportsCheck = [ "mistralai" ];
 
   nativeCheckInputs = [
+    opentelemetry-instrumentation-httpx
     pytest-asyncio
     pytestCheckHook
   ]
   ++ finalAttrs.passthru.optional-dependencies.agents
   ++ finalAttrs.passthru.optional-dependencies.gcp
   ++ finalAttrs.passthru.optional-dependencies.realtime
-  ++ finalAttrs.passthru.optional-dependencies.telemetry;
+  ++ finalAttrs.passthru.optional-dependencies.telemetry
+  ++ finalAttrs.passthru.optional-dependencies.workflow_payload_compression;
 
   disabledTestPaths = [
-    # ModuleNotFoundError: No module named 'opentelemetry.instrumentation'
-    "src/mistralai/extra/tests/test_otel_tracing.py"
-    # ModuleNotFoundError: No module named 'msgpack'
-    "src/mistralai/extra/tests/test_workflow_encoding.py"
-    # '062f2cad7f1fee8c3e409b73d431e71b' not found in '00-e5d29cde482d5d796428c10d13e86060-468fe44f7efdb086-01'
-    "src/mistralai/extra/tests/test_traceparent_hook.py::TestTraceparentInjectionHook::test_propagates_sampled_active_span"
+    # Local test servers cannot bind in the Nix sandbox.
+    "src/mistralai/extra/tests/test_otel_tracing.py::TestOtelTracing::test_app_otel_does_not_enable_mistral_span_without_mistral_telemetry"
+    "src/mistralai/extra/tests/test_otel_tracing.py::TestOtelTracing::test_concurrent_async_httpx_auto_instrumented_spans_are_genai_children"
+    "src/mistralai/extra/tests/test_otel_tracing.py::TestOtelTracing::test_httpx_auto_instrumented_span_is_child_of_genai_span"
+    "src/mistralai/extra/tests/test_otel_tracing.py::TestPerInstanceTracerProvider::test_get_telemetry_tracer_dedicated_provider_captures_app_spans"
   ];
 
   meta = {