diff --git a/ci/dash/matrix.sh b/ci/dash/matrix.sh
index 224408b8e752..49117d71c82f 100755
--- a/ci/dash/matrix.sh
+++ b/ci/dash/matrix.sh
@@ -32,12 +32,6 @@ elif [ "$BUILD_TARGET" = "linux64_sqlite" ]; then
   source ./ci/test/00_setup_env_native_sqlite.sh
 elif [ "$BUILD_TARGET" = "linux64_tsan" ]; then
   source ./ci/test/00_setup_env_native_tsan.sh
-elif [ "$BUILD_TARGET" = "linux64_ubsan" ]; then
-  # TODO: remove it when #7503 will get merged. That's a temporary workaround to check asan on CI
-  # Compatibility for pull_request_target workflows that still request the legacy target.
-  # Their default-branch container setup does not grant SYS_PTRACE.
-  export ASAN_OPTIONS="detect_leaks=0:detect_stack_use_after_return=1:check_initialization_order=1:strict_init_order=1"
-  source ./ci/test/00_setup_env_native_asan.sh
 elif [ "$BUILD_TARGET" = "linux64_valgrind" ]; then
   source ./ci/test/00_setup_env_native_valgrind.sh
 elif [ "$BUILD_TARGET" = "mac" ]; then