diff --git a/shell/platform/fuchsia/dart_runner/BUILD.gn b/shell/platform/fuchsia/dart_runner/BUILD.gn
index de2ebb2901a5c..df46bc3d9ef0e 100644
--- a/shell/platform/fuchsia/dart_runner/BUILD.gn
+++ b/shell/platform/fuchsia/dart_runner/BUILD.gn
@@ -248,21 +248,11 @@ template("jit_runner_package") {
             rebase_path("$target_gen_dir/kernel/vm_data${product_suffix}.bin")
         dest = "vm_snapshot_data.bin"
       },
-      {
-        path = rebase_path(
-                "$target_gen_dir/kernel/vm_instructions${product_suffix}.bin")
-        dest = "vm_snapshot_instructions.bin"
-      },
       {
         path = rebase_path(
                 "$target_gen_dir/kernel/isolate_data${product_suffix}.bin")
         dest = "isolate_core_snapshot_data.bin"
       },
-      {
-        path = rebase_path(
-                "$target_gen_dir/kernel/isolate_instructions${product_suffix}.bin")
-        dest = "isolate_core_snapshot_instructions.bin"
-      },
     ]
 
     if (!invoker.product) {
diff --git a/shell/platform/fuchsia/dart_runner/dart_component_controller.cc b/shell/platform/fuchsia/dart_runner/dart_component_controller.cc
index 11c0822e68640..cb729e0555b70 100644
--- a/shell/platform/fuchsia/dart_runner/dart_component_controller.cc
+++ b/shell/platform/fuchsia/dart_runner/dart_component_controller.cc
@@ -304,22 +304,13 @@ bool DartComponentController::SetUpFromKernel() {
           isolate_snapshot_data_)) {
     return false;
   }
-  if (!dart_utils::MappedResource::LoadFromNamespace(
-          nullptr, "/pkg/data/isolate_core_snapshot_instructions.bin",
-          isolate_snapshot_instructions_, true /* executable */)) {
-    return false;
-  }
-
-  if (!CreateIsolate(isolate_snapshot_data_.address(),
-                     isolate_snapshot_instructions_.address())) {
-    return false;
-  }
-
-  Dart_EnterScope();
 
   std::string str(reinterpret_cast<const char*>(manifest.address()),
                   manifest.size());
   Dart_Handle library = Dart_Null();
+
+  bool first_library = true;
+  bool result_sound_null_safety = false;
   for (size_t start = 0; start < manifest.size();) {
     size_t end = str.find("\n", start);
     if (end == std::string::npos) {
@@ -339,6 +330,37 @@ bool DartComponentController::SetUpFromKernel() {
       Dart_ExitScope();
       return false;
     }
+    bool sound_null_safety = Dart_DetectNullSafety(
+        /*script_uri=*/nullptr, /*package_config=*/nullptr,
+        /*original_working_directory=*/nullptr,
+        isolate_snapshot_data_.address(),
+        /*isolate_snapshot_instructions=*/nullptr, kernel.address(),
+        kernel.size());
+
+    if (first_library) {
+      result_sound_null_safety = sound_null_safety;
+      first_library = false;
+    } else if (sound_null_safety != result_sound_null_safety) {
+      FX_LOG(ERROR, LOG_TAG, "Inconsistent sound null safety");
+      return false;
+    }
+
+    kernel_peices_.emplace_back(std::move(kernel));
+  }
+
+  Dart_IsolateFlags isolate_flags;
+  Dart_IsolateFlagsInitialize(&isolate_flags);
+  isolate_flags.null_safety = result_sound_null_safety;
+
+  if (!CreateIsolate(isolate_snapshot_data_.address(),
+                     /*isolate_snapshot_instructions=*/nullptr,
+                     &isolate_flags)) {
+    return false;
+  }
+
+  Dart_EnterScope();
+
+  for (const auto& kernel : kernel_peices_) {
     library = Dart_LoadLibraryFromKernel(kernel.address(), kernel.size());
     if (Dart_IsError(library)) {
       FX_LOGF(ERROR, LOG_TAG, "Cannot load library from kernel: %s",
@@ -346,9 +368,8 @@ bool DartComponentController::SetUpFromKernel() {
       Dart_ExitScope();
       return false;
     }
-
-    kernel_peices_.emplace_back(std::move(kernel));
   }
+
   Dart_SetRootLibrary(library);
 
   Dart_Handle result = Dart_FinalizeLoading(false);
@@ -381,19 +402,18 @@ bool DartComponentController::SetUpFromAppSnapshot() {
             isolate_snapshot_data_)) {
       return false;
     }
-    if (!dart_utils::MappedResource::LoadFromNamespace(
-            namespace_, data_path_ + "/isolate_snapshot_instructions.bin",
-            isolate_snapshot_instructions_, true /* executable */)) {
-      return false;
-    }
+    isolate_data = isolate_snapshot_data_.address();
+    isolate_instructions = nullptr;
   }
-  return CreateIsolate(isolate_data, isolate_instructions);
+  return CreateIsolate(isolate_data, isolate_instructions,
+                       /*isolate_flags=*/nullptr);
 #endif  // defined(AOT_RUNTIME)
 }
 
 bool DartComponentController::CreateIsolate(
     const uint8_t* isolate_snapshot_data,
-    const uint8_t* isolate_snapshot_instructions) {
+    const uint8_t* isolate_snapshot_instructions,
+    Dart_IsolateFlags* isolate_flags) {
   // Create the isolate from the snapshot.
   char* error = nullptr;
 
@@ -406,7 +426,7 @@ bool DartComponentController::CreateIsolate(
 
   isolate_ = Dart_CreateIsolateGroup(
       url_.c_str(), label_.c_str(), isolate_snapshot_data,
-      isolate_snapshot_instructions, nullptr /* flags */, state, state, &error);
+      isolate_snapshot_instructions, isolate_flags, state, state, &error);
   if (!isolate_) {
     FX_LOGF(ERROR, LOG_TAG, "Dart_CreateIsolateGroup failed: %s", error);
     return false;
diff --git a/shell/platform/fuchsia/dart_runner/dart_component_controller.h b/shell/platform/fuchsia/dart_runner/dart_component_controller.h
index fdc244079217a..e8c3701a22458 100644
--- a/shell/platform/fuchsia/dart_runner/dart_component_controller.h
+++ b/shell/platform/fuchsia/dart_runner/dart_component_controller.h
@@ -61,7 +61,8 @@ class DartComponentController
   bool SetUpFromAppSnapshot();
 
   bool CreateIsolate(const uint8_t* isolate_snapshot_data,
-                     const uint8_t* isolate_snapshot_instructions);
+                     const uint8_t* isolate_snapshot_instructions,
+                     Dart_IsolateFlags* isolate_flags);
 
   // |Echo|
   void EchoString(fidl::StringPtr value, EchoStringCallback callback) override;
diff --git a/shell/platform/fuchsia/dart_runner/dart_runner.cc b/shell/platform/fuchsia/dart_runner/dart_runner.cc
index 012badf098820..3c0012347497d 100644
--- a/shell/platform/fuchsia/dart_runner/dart_runner.cc
+++ b/shell/platform/fuchsia/dart_runner/dart_runner.cc
@@ -56,10 +56,6 @@ const char* kDartVMArgs[] = {
 #if !defined(DART_PRODUCT) && (!defined(FLUTTER_PROFILE) || !defined(NDEBUG))
     "--enable_asserts",
 #endif
-    // Run in unsound null safety mode as some packages used in Integration
-    // testing have not been migrated yet.
-    "--no-sound-null-safety",
-    // clang-format on
 };
 
 Dart_Isolate IsolateGroupCreateCallback(const char* uri,
@@ -226,13 +222,7 @@ DartRunner::DartRunner(sys::ComponentContext* context) : context_(context) {
           nullptr, "/pkg/data/vm_snapshot_data.bin", vm_snapshot_data_)) {
     FX_LOG(FATAL, LOG_TAG, "Failed to load vm snapshot data");
   }
-  if (!dart_utils::MappedResource::LoadFromNamespace(
-          nullptr, "/pkg/data/vm_snapshot_instructions.bin",
-          vm_snapshot_instructions_, true /* executable */)) {
-    FX_LOG(FATAL, LOG_TAG, "Failed to load vm snapshot instructions");
-  }
   params.vm_snapshot_data = vm_snapshot_data_.address();
-  params.vm_snapshot_instructions = vm_snapshot_instructions_.address();
 #endif
   params.create_group = IsolateGroupCreateCallback;
   params.shutdown_isolate = IsolateShutdownCallback;
diff --git a/shell/platform/fuchsia/dart_runner/dart_test_component_controller.cc b/shell/platform/fuchsia/dart_runner/dart_test_component_controller.cc
index b9ce55676c481..09265fa462960 100644
--- a/shell/platform/fuchsia/dart_runner/dart_test_component_controller.cc
+++ b/shell/platform/fuchsia/dart_runner/dart_test_component_controller.cc
@@ -241,27 +241,17 @@ bool DartTestComponentController::SetUpFromKernel() {
           isolate_snapshot_data_)) {
     return false;
   }
-  if (!dart_utils::MappedResource::LoadFromNamespace(
-          nullptr, "/pkg/data/isolate_core_snapshot_instructions.bin",
-          isolate_snapshot_instructions_, true /* executable */)) {
-    return false;
-  }
-
-  if (!CreateIsolate(isolate_snapshot_data_.address(),
-                     isolate_snapshot_instructions_.address())) {
-    return false;
-  }
-
-  Dart_EnterScope();
 
   std::string str(reinterpret_cast<const char*>(manifest.address()),
                   manifest.size());
   Dart_Handle library = Dart_Null();
+
+  bool first_library = true;
+  bool result_sound_null_safety = false;
   for (size_t start = 0; start < manifest.size();) {
     size_t end = str.find("\n", start);
     if (end == std::string::npos) {
       FX_LOG(ERROR, LOG_TAG, "Malformed manifest");
-      Dart_ExitScope();
       return false;
     }
 
@@ -273,9 +263,39 @@ bool DartTestComponentController::SetUpFromKernel() {
                                                        kernel)) {
       FX_LOGF(ERROR, LOG_TAG, "Cannot load kernel from namespace: %s",
               path.c_str());
-      Dart_ExitScope();
       return false;
     }
+    bool sound_null_safety = Dart_DetectNullSafety(
+        /*script_uri=*/nullptr, /*package_config=*/nullptr,
+        /*original_working_directory=*/nullptr,
+        isolate_snapshot_data_.address(),
+        /*isolate_snapshot_instructions=*/nullptr, kernel.address(),
+        kernel.size());
+
+    if (first_library) {
+      result_sound_null_safety = sound_null_safety;
+      first_library = false;
+    } else if (sound_null_safety != result_sound_null_safety) {
+      FX_LOG(ERROR, LOG_TAG, "Inconsistent sound null safety");
+      return false;
+    }
+
+    kernel_peices_.emplace_back(std::move(kernel));
+  }
+
+  Dart_IsolateFlags isolate_flags;
+  Dart_IsolateFlagsInitialize(&isolate_flags);
+  isolate_flags.null_safety = result_sound_null_safety;
+
+  if (!CreateIsolate(isolate_snapshot_data_.address(),
+                     /*isolate_snapshot_instructions=*/nullptr,
+                     &isolate_flags)) {
+    return false;
+  }
+
+  Dart_EnterScope();
+
+  for (const auto& kernel : kernel_peices_) {
     library = Dart_LoadLibraryFromKernel(kernel.address(), kernel.size());
     if (Dart_IsError(library)) {
       FX_LOGF(ERROR, LOG_TAG, "Cannot load library from kernel: %s",
@@ -283,8 +303,6 @@ bool DartTestComponentController::SetUpFromKernel() {
       Dart_ExitScope();
       return false;
     }
-
-    kernel_peices_.emplace_back(std::move(kernel));
   }
   Dart_SetRootLibrary(library);
 
@@ -318,19 +336,18 @@ bool DartTestComponentController::SetUpFromAppSnapshot() {
             isolate_snapshot_data_)) {
       return false;
     }
-    if (!dart_utils::MappedResource::LoadFromNamespace(
-            namespace_, data_path_ + "/isolate_snapshot_instructions.bin",
-            isolate_snapshot_instructions_, true /* executable */)) {
-      return false;
-    }
+    isolate_data = isolate_snapshot_data_.address();
+    isolate_instructions = nullptr;
   }
-  return CreateIsolate(isolate_data, isolate_instructions);
+  return CreateIsolate(isolate_data, isolate_instructions,
+                       /*isolate_flags=*/nullptr);
 #endif  // defined(AOT_RUNTIME)
 }
 
 bool DartTestComponentController::CreateIsolate(
     const uint8_t* isolate_snapshot_data,
-    const uint8_t* isolate_snapshot_instructions) {
+    const uint8_t* isolate_snapshot_instructions,
+    Dart_IsolateFlags* isolate_flags) {
   // Create the isolate from the snapshot.
   char* error = nullptr;
 
@@ -343,7 +360,7 @@ bool DartTestComponentController::CreateIsolate(
 
   isolate_ = Dart_CreateIsolateGroup(
       url_.c_str(), label_.c_str(), isolate_snapshot_data,
-      isolate_snapshot_instructions, nullptr /* flags */, state, state, &error);
+      isolate_snapshot_instructions, isolate_flags, state, state, &error);
   if (!isolate_) {
     FX_LOGF(ERROR, LOG_TAG, "Dart_CreateIsolateGroup failed: %s", error);
     return false;
diff --git a/shell/platform/fuchsia/dart_runner/dart_test_component_controller.h b/shell/platform/fuchsia/dart_runner/dart_test_component_controller.h
index 81655653342d4..3bf9437f2ef52 100644
--- a/shell/platform/fuchsia/dart_runner/dart_test_component_controller.h
+++ b/shell/platform/fuchsia/dart_runner/dart_test_component_controller.h
@@ -77,7 +77,8 @@ class DartTestComponentController
   bool SetUpFromAppSnapshot();
 
   bool CreateIsolate(const uint8_t* isolate_snapshot_data,
-                     const uint8_t* isolate_snapshot_instructions);
+                     const uint8_t* isolate_snapshot_instructions,
+                     Dart_IsolateFlags* isolate_flags);
 
   // |ComponentController|
   void Kill() override;
diff --git a/shell/platform/fuchsia/dart_runner/kernel/BUILD.gn b/shell/platform/fuchsia/dart_runner/kernel/BUILD.gn
index 2c24da81da177..af896f65e28b8 100644
--- a/shell/platform/fuchsia/dart_runner/kernel/BUILD.gn
+++ b/shell/platform/fuchsia/dart_runner/kernel/BUILD.gn
@@ -40,17 +40,11 @@ template("create_kernel_core_snapshot") {
     inputs = [ platform_dill ]
 
     vm_snapshot_data = "$target_gen_dir/vm_data${product_suffix}.bin"
-    vm_snapshot_instructions =
-        "$target_gen_dir/vm_instructions${product_suffix}.bin"
     isolate_snapshot_data = "$target_gen_dir/isolate_data${product_suffix}.bin"
-    isolate_snapshot_instructions =
-        "$target_gen_dir/isolate_instructions${product_suffix}.bin"
     snapshot_profile = "$target_gen_dir/snapshot_profile${product_suffix}.json"
     outputs = [
       vm_snapshot_data,
-      vm_snapshot_instructions,
       isolate_snapshot_data,
-      isolate_snapshot_instructions,
       snapshot_profile,
     ]
 
@@ -64,14 +58,10 @@ template("create_kernel_core_snapshot") {
     args = [
       "--enable_mirrors=false",
       "--deterministic",
-      "--snapshot_kind=core-jit",
+      "--snapshot_kind=core",
       "--vm_snapshot_data=" + rebase_path(vm_snapshot_data, root_build_dir),
-      "--vm_snapshot_instructions=" +
-          rebase_path(vm_snapshot_instructions, root_build_dir),
       "--isolate_snapshot_data=" +
           rebase_path(isolate_snapshot_data, root_build_dir),
-      "--isolate_snapshot_instructions=" +
-          rebase_path(isolate_snapshot_instructions, root_build_dir),
       "--write_v8_snapshot_profile_to=" +
           rebase_path(snapshot_profile, root_build_dir),
     ]