diff --git a/src/ast/modules.cc b/src/ast/modules.cc
index 6d1bff226d..074dcea1ff 100644
--- a/src/ast/modules.cc
+++ b/src/ast/modules.cc
@@ -6,6 +6,7 @@
 
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/scopes.h"
+#include "src/common/globals.h"
 #include "src/heap/local-factory-inl.h"
 #include "src/objects/module-inl.h"
 #include "src/objects/objects-inl.h"
@@ -130,8 +131,10 @@ Handle<ModuleRequest> SourceTextModuleDescriptor::AstModuleRequest::Serialize(
   // The import assertions will be stored in this array in the form:
   // [key1, value1, location1, key2, value2, location2, ...]
   Handle<FixedArray> import_assertions_array =
-      isolate->factory()->NewFixedArray(static_cast<int>(
-          import_assertions()->size() * ModuleRequest::kAssertionEntrySize));
+      isolate->factory()->NewFixedArray(
+          static_cast<int>(import_assertions()->size() *
+                           ModuleRequest::kAssertionEntrySize),
+          AllocationType::kOld);
 
   int i = 0;
   for (auto iter = import_assertions()->cbegin();
@@ -189,7 +192,8 @@ Handle<FixedArray> SourceTextModuleDescriptor::SerializeRegularExports(
       ++count;
     } while (next != regular_exports_.end() && next->first == it->first);
 
-    Handle<FixedArray> export_names = isolate->factory()->NewFixedArray(count);
+    Handle<FixedArray> export_names =
+        isolate->factory()->NewFixedArray(count, AllocationType::kOld);
     data[index + SourceTextModuleInfo::kRegularExportLocalNameOffset] =
         it->second->local_name->string();
     data[index + SourceTextModuleInfo::kRegularExportCellIndexOffset] =
@@ -213,7 +217,8 @@ Handle<FixedArray> SourceTextModuleDescriptor::SerializeRegularExports(
 
   // We cannot create the FixedArray earlier because we only now know the
   // precise size.
-  Handle<FixedArray> result = isolate->factory()->NewFixedArray(index);
+  Handle<FixedArray> result =
+      isolate->factory()->NewFixedArray(index, AllocationType::kOld);
   for (int i = 0; i < index; ++i) {
     result->set(i, *data[i]);
   }
diff --git a/src/codegen/compiler.cc b/src/codegen/compiler.cc
index 272728cb42..99f6d725f9 100644
--- a/src/codegen/compiler.cc
+++ b/src/codegen/compiler.cc
@@ -1609,7 +1609,7 @@ void BackgroundCompileTask::Run() {
   // Save the language mode.
   language_mode_ = info_->language_mode();
 
-  if (!FLAG_finalize_streaming_on_background || info_->flags().is_module()) {
+  if (!FLAG_finalize_streaming_on_background) {
     if (info_->literal() != nullptr) {
       CompileOnBackgroundThread(info_.get(), compile_state_.allocator(),
                                 &compilation_jobs_);
@@ -3034,7 +3034,7 @@ Compiler::GetSharedFunctionInfoForStreamedScript(
     DCHECK_EQ(task->flags().is_module(), origin_options.IsModule());
 
     Handle<Script> script;
-    if (FLAG_finalize_streaming_on_background && !origin_options.IsModule()) {
+    if (FLAG_finalize_streaming_on_background) {
       RCS_SCOPE(isolate,
                 RuntimeCallCounterId::kCompilePublishBackgroundFinalization);
       TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
diff --git a/src/objects/scope-info.cc b/src/objects/scope-info.cc
index c3efda24cd..6cafd72d65 100644
--- a/src/objects/scope-info.cc
+++ b/src/objects/scope-info.cc
@@ -1127,7 +1127,8 @@ Handle<SourceTextModuleInfo> SourceTextModuleInfo::New(
     IsolateT* isolate, Zone* zone, SourceTextModuleDescriptor* descr) {
   // Serialize module requests.
   int size = static_cast<int>(descr->module_requests().size());
-  Handle<FixedArray> module_requests = isolate->factory()->NewFixedArray(size);
+  Handle<FixedArray> module_requests =
+      isolate->factory()->NewFixedArray(size, AllocationType::kOld);
   for (const auto& elem : descr->module_requests()) {
     Handle<ModuleRequest> serialized_module_request = elem->Serialize(isolate);
     module_requests->set(elem->index(), *serialized_module_request);
@@ -1135,7 +1136,7 @@ Handle<SourceTextModuleInfo> SourceTextModuleInfo::New(
 
   // Serialize special exports.
   Handle<FixedArray> special_exports = isolate->factory()->NewFixedArray(
-      static_cast<int>(descr->special_exports().size()));
+      static_cast<int>(descr->special_exports().size()), AllocationType::kOld);
   {
     int i = 0;
     for (auto entry : descr->special_exports()) {
@@ -1147,7 +1148,8 @@ Handle<SourceTextModuleInfo> SourceTextModuleInfo::New(
 
   // Serialize namespace imports.
   Handle<FixedArray> namespace_imports = isolate->factory()->NewFixedArray(
-      static_cast<int>(descr->namespace_imports().size()));
+      static_cast<int>(descr->namespace_imports().size()),
+      AllocationType::kOld);
   {
     int i = 0;
     for (auto entry : descr->namespace_imports()) {
@@ -1163,7 +1165,7 @@ Handle<SourceTextModuleInfo> SourceTextModuleInfo::New(
 
   // Serialize regular imports.
   Handle<FixedArray> regular_imports = isolate->factory()->NewFixedArray(
-      static_cast<int>(descr->regular_imports().size()));
+      static_cast<int>(descr->regular_imports().size()), AllocationType::kOld);
   {
     int i = 0;
     for (const auto& elem : descr->regular_imports()) {