diff --git a/tensorflow/lite/micro/all_ops_resolver.h b/tensorflow/lite/micro/all_ops_resolver.h
index f39c24ec732..e8105b96e44 100644
--- a/tensorflow/lite/micro/all_ops_resolver.h
+++ b/tensorflow/lite/micro/all_ops_resolver.h
@@ -26,6 +26,7 @@ class AllOpsResolver : public MicroMutableOpResolver<128> {
  public:
   AllOpsResolver();
 
+ private:
   TF_LITE_REMOVE_VIRTUAL_DELETE
 };
 
diff --git a/tensorflow/lite/micro/micro_mutable_op_resolver.h b/tensorflow/lite/micro/micro_mutable_op_resolver.h
index def0bbcc8e9..fc13dad637e 100644
--- a/tensorflow/lite/micro/micro_mutable_op_resolver.h
+++ b/tensorflow/lite/micro/micro_mutable_op_resolver.h
@@ -36,7 +36,6 @@ class MicroMutableOpResolver : public MicroOpResolver {
   explicit MicroMutableOpResolver(ErrorReporter* error_reporter = nullptr)
       : error_reporter_(error_reporter) {}
 
-  TF_LITE_REMOVE_VIRTUAL_DELETE
 
   const TfLiteRegistration* FindOp(tflite::BuiltinOperator op) const override {
     if (op == BuiltinOperator_CUSTOM) return nullptr;
@@ -406,6 +405,8 @@ class MicroMutableOpResolver : public MicroOpResolver {
   unsigned int GetRegistrationLength() { return registrations_len_; }
 
  private:
+  TF_LITE_REMOVE_VIRTUAL_DELETE
+
   TfLiteStatus AddBuiltin(tflite::BuiltinOperator op,
                           const TfLiteRegistration& registration,
                           MicroOpResolver::BuiltinParseFunction parser) {
diff --git a/tensorflow/lite/micro/tools/ci_build/test_x86.sh b/tensorflow/lite/micro/tools/ci_build/test_x86.sh
index dfd779a485b..844dccbafb7 100755
--- a/tensorflow/lite/micro/tools/ci_build/test_x86.sh
+++ b/tensorflow/lite/micro/tools/ci_build/test_x86.sh
@@ -37,6 +37,13 @@ readable_run make -j8 -f tensorflow/lite/micro/tools/make/Makefile BUILD_TYPE=no
 readable_run make -f tensorflow/lite/micro/tools/make/Makefile clean
 readable_run make -j8 -f tensorflow/lite/micro/tools/make/Makefile BUILD_TYPE=release build
 
+# Next, build with TAGS=posix. See b/170223867 for more details.
+# TODO(b/168123200): Since the benchmarks can not currently be run as a test, we
+# only build with TAGS=posix. Once benchmarks can be run (and are added to make
+# test) we should switch to running all the tests with TAGS=posix.
+readable_run make -f tensorflow/lite/micro/tools/make/Makefile clean
+readable_run make -s -j8 -f tensorflow/lite/micro/tools/make/Makefile build TAGS=posix
+
 # Next, build w/o release so that we can run the tests and get additional
 # debugging info on failures.
 readable_run make -f tensorflow/lite/micro/tools/make/Makefile clean