diff --git a/tests/common_test.cpp b/tests/common_test.cpp
index eb3a5bc..d8184a7 100644
--- a/tests/common_test.cpp
+++ b/tests/common_test.cpp
@@ -43,8 +43,7 @@
   EXPECT_GT(getResidentMemorySize() - OnStart, Size - Threshold);
 
   releasePagesToOS((uptr)P, 0, Size, &Data);
-  // FIXME: does not work with QEMU-user.
-  // EXPECT_LT(getResidentMemorySize() - OnStart, Threshold);
+  EXPECT_LT(getResidentMemorySize() - OnStart, Threshold);
 
   memset(P, 1, Size);
   EXPECT_GT(getResidentMemorySize() - OnStart, Size - Threshold);