diff --git a/src/tests/core/arm/arm_test_common.cpp b/src/tests/core/arm/arm_test_common.cpp
index 7f9f27e192..539746246b 100644
--- a/src/tests/core/arm/arm_test_common.cpp
+++ b/src/tests/core/arm/arm_test_common.cpp
@@ -10,8 +10,6 @@
 
 namespace ArmTests {
 
-static Memory::PageTable* page_table = nullptr;
-
 TestEnvironment::TestEnvironment(bool mutable_memory_)
     : mutable_memory(mutable_memory_), test_memory(std::make_shared<TestMemory>(this)) {
 
@@ -67,10 +65,13 @@ boost::optional<bool> TestEnvironment::TestMemory::IsValidAddress(VAddr addr) {
 }
 
 boost::optional<u8> TestEnvironment::TestMemory::Read8(VAddr addr) {
-    auto iter = data.find(addr);
+    const auto iter = data.find(addr);
+
     if (iter == data.end()) {
-        return addr; // Some arbitrary data
+        // Some arbitrary data
+        return static_cast<u8>(addr);
     }
+
     return iter->second;
 }
 
diff --git a/src/tests/core/arm/arm_test_common.h b/src/tests/core/arm/arm_test_common.h
index b66922d61e..7fdbda494c 100644
--- a/src/tests/core/arm/arm_test_common.h
+++ b/src/tests/core/arm/arm_test_common.h
@@ -2,6 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#pragma once
+
 #include <tuple>
 #include <unordered_map>
 #include <vector>
@@ -9,6 +11,10 @@
 #include "common/common_types.h"
 #include "core/memory_hook.h"
 
+namespace Memory {
+struct PageTable;
+}
+
 namespace ArmTests {
 
 struct WriteRecord {
@@ -79,6 +85,7 @@ private:
     bool mutable_memory;
     std::shared_ptr<TestMemory> test_memory;
     std::vector<WriteRecord> write_records;
+    Memory::PageTable* page_table = nullptr;
 };
 
 } // namespace ArmTests