diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6e6c48f8c9a..1d64f9eaf24 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19889,6 +19889,7 @@ 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 d44d1f16f40..1409be0579a 100644
--- a/build_autogenerated.yaml
+++ b/build_autogenerated.yaml
@@ -12167,6 +12167,7 @@ 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
@@ -12185,6 +12186,7 @@ targets:
   - test/core/promise/observable_test.cc
   deps:
   - gtest
+  - absl/base:config
   - absl/hash:hash
   - absl/meta:type_traits
   - absl/status:statusor