diff --git a/rust/BUILD b/rust/BUILD
index ff47fccc5a..4ea1156a13 100644
--- a/rust/BUILD
+++ b/rust/BUILD
@@ -30,6 +30,8 @@ rust_test(
         "//conditions:default": ["--cfg=cpp_kernel"],
     }),
     tags = [
+        # TODO(b/243126140): Enable msan once we support sanitizers with Rust.
+        "nomsan",
         "not_build:arm",
         "notsan",
     ],
diff --git a/rust/upb_kernel/BUILD b/rust/upb_kernel/BUILD
index f2daca3b25..d77b5d9ecc 100644
--- a/rust/upb_kernel/BUILD
+++ b/rust/upb_kernel/BUILD
@@ -15,6 +15,8 @@ rust_test(
     tags = [
         "not_build:arm",
         "notsan",
+        # TODO(b/243126140): Enable msan once we support sanitizers with Rust.
+        "nomsan",
     ],
 )