diff --git a/tests/VirtualMemoryAllocationTests.cpp b/tests/VirtualMemoryAllocationTests.cpp
index 29d478524..d1d9dc1a6 100644
--- a/tests/VirtualMemoryAllocationTests.cpp
+++ b/tests/VirtualMemoryAllocationTests.cpp
@@ -2165,7 +2165,8 @@ void TestFixedReserveRangeAddRollbackKeepsPlaceholder() {
 
 void TestExtendedAndUserMappingsDoNotAlias() {
 	const char* test = "ExtendedAndUserMappingsDoNotAlias";
-	constexpr uint64_t user_address = 0x1000000000ull;
+	// macOS starts its ordinary guest range at 448 GiB.
+	constexpr uint64_t user_address = 0x7000000000ull;
 	const uint64_t addresses[] {
 	    user_address,
 	    Libs::LibKernel::Memory::kExtendedMemoryBase + user_address,