diff --git a/CMakeLists.txt b/CMakeLists.txt
index 98864c176f1..1f2bc20c696 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -957,7 +957,9 @@ if(gRPC_BUILD_TESTS)
   add_dependencies(buildtests_cxx channel_trace_test)
   add_dependencies(buildtests_cxx channelz_registry_test)
   add_dependencies(buildtests_cxx channelz_service_test)
-  add_dependencies(buildtests_cxx chaotic_good_test)
+  if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_POSIX)
+    add_dependencies(buildtests_cxx chaotic_good_test)
+  endif()
   add_dependencies(buildtests_cxx check_gcp_environment_linux_test)
   add_dependencies(buildtests_cxx check_gcp_environment_windows_test)
   add_dependencies(buildtests_cxx chunked_vector_test)
@@ -1130,7 +1132,9 @@ if(gRPC_BUILD_TESTS)
   add_dependencies(buildtests_cxx if_test)
   add_dependencies(buildtests_cxx init_test)
   add_dependencies(buildtests_cxx initial_settings_frame_bad_client_test)
-  add_dependencies(buildtests_cxx inproc_test)
+  if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_POSIX)
+    add_dependencies(buildtests_cxx inproc_test)
+  endif()
   add_dependencies(buildtests_cxx insecure_security_connector_test)
   add_dependencies(buildtests_cxx inter_activity_latch_test)
   add_dependencies(buildtests_cxx inter_activity_pipe_test)
@@ -9888,65 +9892,67 @@ target_link_libraries(channelz_service_test
 
 endif()
 if(gRPC_BUILD_TESTS)
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_POSIX)
 
-add_executable(chaotic_good_test
-  ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.pb.cc
-  ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.grpc.pb.cc
-  ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.pb.h
-  ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.grpc.pb.h
-  src/core/ext/transport/chaotic_good/chaotic_good_transport.cc
-  src/core/ext/transport/chaotic_good/client_transport.cc
-  src/core/ext/transport/chaotic_good/frame.cc
-  src/core/ext/transport/chaotic_good/frame_header.cc
-  src/core/ext/transport/chaotic_good/server_transport.cc
-  src/core/lib/transport/promise_endpoint.cc
-  test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.cc
-  test/core/transport/test_suite/call_content.cc
-  test/core/transport/test_suite/call_shapes.cc
-  test/core/transport/test_suite/chaotic_good_fixture.cc
-  test/core/transport/test_suite/fixture.cc
-  test/core/transport/test_suite/no_op.cc
-  test/core/transport/test_suite/stress.cc
-  test/core/transport/test_suite/test.cc
-  test/core/transport/test_suite/test_main.cc
-)
-if(WIN32 AND MSVC)
-  if(BUILD_SHARED_LIBS)
-    target_compile_definitions(chaotic_good_test
-    PRIVATE
-      "GPR_DLL_IMPORTS"
-      "GRPC_DLL_IMPORTS"
-    )
+  add_executable(chaotic_good_test
+    ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.pb.cc
+    ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.grpc.pb.cc
+    ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.pb.h
+    ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.grpc.pb.h
+    src/core/ext/transport/chaotic_good/chaotic_good_transport.cc
+    src/core/ext/transport/chaotic_good/client_transport.cc
+    src/core/ext/transport/chaotic_good/frame.cc
+    src/core/ext/transport/chaotic_good/frame_header.cc
+    src/core/ext/transport/chaotic_good/server_transport.cc
+    src/core/lib/transport/promise_endpoint.cc
+    test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.cc
+    test/core/transport/test_suite/call_content.cc
+    test/core/transport/test_suite/call_shapes.cc
+    test/core/transport/test_suite/chaotic_good_fixture.cc
+    test/core/transport/test_suite/fixture.cc
+    test/core/transport/test_suite/no_op.cc
+    test/core/transport/test_suite/stress.cc
+    test/core/transport/test_suite/test.cc
+    test/core/transport/test_suite/test_main.cc
+  )
+  if(WIN32 AND MSVC)
+    if(BUILD_SHARED_LIBS)
+      target_compile_definitions(chaotic_good_test
+      PRIVATE
+        "GPR_DLL_IMPORTS"
+        "GRPC_DLL_IMPORTS"
+      )
+    endif()
   endif()
-endif()
-target_compile_features(chaotic_good_test PUBLIC cxx_std_14)
-target_include_directories(chaotic_good_test
-  PRIVATE
-    ${CMAKE_CURRENT_SOURCE_DIR}
-    ${CMAKE_CURRENT_SOURCE_DIR}/include
-    ${_gRPC_ADDRESS_SORTING_INCLUDE_DIR}
-    ${_gRPC_RE2_INCLUDE_DIR}
-    ${_gRPC_SSL_INCLUDE_DIR}
-    ${_gRPC_UPB_GENERATED_DIR}
-    ${_gRPC_UPB_GRPC_GENERATED_DIR}
-    ${_gRPC_UPB_INCLUDE_DIR}
-    ${_gRPC_XXHASH_INCLUDE_DIR}
-    ${_gRPC_ZLIB_INCLUDE_DIR}
-    third_party/googletest/googletest/include
-    third_party/googletest/googletest
-    third_party/googletest/googlemock/include
-    third_party/googletest/googlemock
-    ${_gRPC_PROTO_GENS_DIR}
-)
+  target_compile_features(chaotic_good_test PUBLIC cxx_std_14)
+  target_include_directories(chaotic_good_test
+    PRIVATE
+      ${CMAKE_CURRENT_SOURCE_DIR}
+      ${CMAKE_CURRENT_SOURCE_DIR}/include
+      ${_gRPC_ADDRESS_SORTING_INCLUDE_DIR}
+      ${_gRPC_RE2_INCLUDE_DIR}
+      ${_gRPC_SSL_INCLUDE_DIR}
+      ${_gRPC_UPB_GENERATED_DIR}
+      ${_gRPC_UPB_GRPC_GENERATED_DIR}
+      ${_gRPC_UPB_INCLUDE_DIR}
+      ${_gRPC_XXHASH_INCLUDE_DIR}
+      ${_gRPC_ZLIB_INCLUDE_DIR}
+      third_party/googletest/googletest/include
+      third_party/googletest/googletest
+      third_party/googletest/googlemock/include
+      third_party/googletest/googlemock
+      ${_gRPC_PROTO_GENS_DIR}
+  )
 
-target_link_libraries(chaotic_good_test
-  ${_gRPC_ALLTARGETS_LIBRARIES}
-  gtest
-  ${_gRPC_PROTOBUF_LIBRARIES}
-  grpc_test_util
-)
+  target_link_libraries(chaotic_good_test
+    ${_gRPC_ALLTARGETS_LIBRARIES}
+    gtest
+    ${_gRPC_PROTOBUF_LIBRARIES}
+    grpc_test_util
+  )
 
 
+endif()
 endif()
 if(gRPC_BUILD_TESTS)
 
@@ -17273,59 +17279,61 @@ target_link_libraries(initial_settings_frame_bad_client_test
 
 endif()
 if(gRPC_BUILD_TESTS)
+if(_gRPC_PLATFORM_LINUX OR _gRPC_PLATFORM_POSIX)
 
-add_executable(inproc_test
-  ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.pb.cc
-  ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.grpc.pb.cc
-  ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.pb.h
-  ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.grpc.pb.h
-  test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.cc
-  test/core/transport/test_suite/call_content.cc
-  test/core/transport/test_suite/call_shapes.cc
-  test/core/transport/test_suite/fixture.cc
-  test/core/transport/test_suite/inproc_fixture.cc
-  test/core/transport/test_suite/no_op.cc
-  test/core/transport/test_suite/stress.cc
-  test/core/transport/test_suite/test.cc
-  test/core/transport/test_suite/test_main.cc
-)
-if(WIN32 AND MSVC)
-  if(BUILD_SHARED_LIBS)
-    target_compile_definitions(inproc_test
-    PRIVATE
-      "GPR_DLL_IMPORTS"
-      "GRPC_DLL_IMPORTS"
-    )
+  add_executable(inproc_test
+    ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.pb.cc
+    ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.grpc.pb.cc
+    ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.pb.h
+    ${_gRPC_PROTO_GENS_DIR}/test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.grpc.pb.h
+    test/core/event_engine/fuzzing_event_engine/fuzzing_event_engine.cc
+    test/core/transport/test_suite/call_content.cc
+    test/core/transport/test_suite/call_shapes.cc
+    test/core/transport/test_suite/fixture.cc
+    test/core/transport/test_suite/inproc_fixture.cc
+    test/core/transport/test_suite/no_op.cc
+    test/core/transport/test_suite/stress.cc
+    test/core/transport/test_suite/test.cc
+    test/core/transport/test_suite/test_main.cc
+  )
+  if(WIN32 AND MSVC)
+    if(BUILD_SHARED_LIBS)
+      target_compile_definitions(inproc_test
+      PRIVATE
+        "GPR_DLL_IMPORTS"
+        "GRPC_DLL_IMPORTS"
+      )
+    endif()
   endif()
-endif()
-target_compile_features(inproc_test PUBLIC cxx_std_14)
-target_include_directories(inproc_test
-  PRIVATE
-    ${CMAKE_CURRENT_SOURCE_DIR}
-    ${CMAKE_CURRENT_SOURCE_DIR}/include
-    ${_gRPC_ADDRESS_SORTING_INCLUDE_DIR}
-    ${_gRPC_RE2_INCLUDE_DIR}
-    ${_gRPC_SSL_INCLUDE_DIR}
-    ${_gRPC_UPB_GENERATED_DIR}
-    ${_gRPC_UPB_GRPC_GENERATED_DIR}
-    ${_gRPC_UPB_INCLUDE_DIR}
-    ${_gRPC_XXHASH_INCLUDE_DIR}
-    ${_gRPC_ZLIB_INCLUDE_DIR}
-    third_party/googletest/googletest/include
-    third_party/googletest/googletest
-    third_party/googletest/googlemock/include
-    third_party/googletest/googlemock
-    ${_gRPC_PROTO_GENS_DIR}
-)
+  target_compile_features(inproc_test PUBLIC cxx_std_14)
+  target_include_directories(inproc_test
+    PRIVATE
+      ${CMAKE_CURRENT_SOURCE_DIR}
+      ${CMAKE_CURRENT_SOURCE_DIR}/include
+      ${_gRPC_ADDRESS_SORTING_INCLUDE_DIR}
+      ${_gRPC_RE2_INCLUDE_DIR}
+      ${_gRPC_SSL_INCLUDE_DIR}
+      ${_gRPC_UPB_GENERATED_DIR}
+      ${_gRPC_UPB_GRPC_GENERATED_DIR}
+      ${_gRPC_UPB_INCLUDE_DIR}
+      ${_gRPC_XXHASH_INCLUDE_DIR}
+      ${_gRPC_ZLIB_INCLUDE_DIR}
+      third_party/googletest/googletest/include
+      third_party/googletest/googletest
+      third_party/googletest/googlemock/include
+      third_party/googletest/googlemock
+      ${_gRPC_PROTO_GENS_DIR}
+  )
 
-target_link_libraries(inproc_test
-  ${_gRPC_ALLTARGETS_LIBRARIES}
-  gtest
-  ${_gRPC_PROTOBUF_LIBRARIES}
-  grpc_test_util
-)
+  target_link_libraries(inproc_test
+    ${_gRPC_ALLTARGETS_LIBRARIES}
+    gtest
+    ${_gRPC_PROTOBUF_LIBRARIES}
+    grpc_test_util
+  )
 
 
+endif()
 endif()
 if(gRPC_BUILD_TESTS)
 
@@ -20007,6 +20015,7 @@ target_include_directories(observable_test
 target_link_libraries(observable_test
   ${_gRPC_ALLTARGETS_LIBRARIES}
   gtest
+  absl::config
   absl::hash
   absl::type_traits
   absl::statusor
diff --git a/build_autogenerated.yaml b/build_autogenerated.yaml
index 03265498e5e..d34ea3fc363 100644
--- a/build_autogenerated.yaml
+++ b/build_autogenerated.yaml
@@ -7303,6 +7303,9 @@ targets:
   - gtest
   - protobuf
   - grpc_test_util
+  platforms:
+  - linux
+  - posix
 - name: check_gcp_environment_linux_test
   gtest: true
   build: test
@@ -10839,6 +10842,9 @@ targets:
   - gtest
   - protobuf
   - grpc_test_util
+  platforms:
+  - linux
+  - posix
 - name: insecure_security_connector_test
   gtest: true
   build: test
@@ -12231,6 +12237,7 @@ targets:
   language: c++
   headers:
   - src/core/lib/gprpp/atomic_utils.h
+  - src/core/lib/gprpp/down_cast.h
   - src/core/lib/gprpp/notification.h
   - src/core/lib/gprpp/orphanable.h
   - src/core/lib/gprpp/ref_counted.h
@@ -12249,6 +12256,7 @@ targets:
   - test/core/promise/observable_test.cc
   deps:
   - gtest
+  - absl/base:config
   - absl/hash:hash
   - absl/meta:type_traits
   - absl/status:statusor
diff --git a/tools/run_tests/generated/tests.json b/tools/run_tests/generated/tests.json
index 40a3d71ed95..6d3fc272028 100644
--- a/tools/run_tests/generated/tests.json
+++ b/tools/run_tests/generated/tests.json
@@ -1950,9 +1950,7 @@
     "benchmark": false,
     "ci_platforms": [
       "linux",
-      "mac",
-      "posix",
-      "windows"
+      "posix"
     ],
     "cpu_cost": 1.0,
     "exclude_configs": [],
@@ -1963,9 +1961,7 @@
     "name": "chaotic_good_test",
     "platforms": [
       "linux",
-      "mac",
-      "posix",
-      "windows"
+      "posix"
     ],
     "uses_polling": true
   },
@@ -5064,9 +5060,7 @@
     "benchmark": false,
     "ci_platforms": [
       "linux",
-      "mac",
-      "posix",
-      "windows"
+      "posix"
     ],
     "cpu_cost": 1.0,
     "exclude_configs": [],
@@ -5077,9 +5071,7 @@
     "name": "inproc_test",
     "platforms": [
       "linux",
-      "mac",
-      "posix",
-      "windows"
+      "posix"
     ],
     "uses_polling": true
   },