diff --git a/tests/Makefile.tests.mk b/tests/Makefile.tests.mk
index 01442a8a00..fe5d955bca 100644
--- a/tests/Makefile.tests.mk
+++ b/tests/Makefile.tests.mk
@@ -5,8 +5,6 @@ FAILING_TESTS=
 else
 # Wrong modified time
 FAILING_TESTS := futimens
-# Crash, mmap issue
-FAILING_TESTS += malloc/usable_size
 # Not a FIFO
 FAILING_TESTS += mkfifo
 # Waitpid had EINTR
@@ -72,6 +70,7 @@ EXPECT_NAMES=\
 	locale/duplocale \
 	locale/newlocale \
 	locale/setlocale \
+	malloc/usable_size \
 	math \
 	regex \
 	semaphore/lock \
diff --git a/tests/expected/malloc/usable_size.stdout b/tests/expected/malloc/usable_size.stdout
index 4188b67b66..8a214d652d 100644
--- a/tests/expected/malloc/usable_size.stdout
+++ b/tests/expected/malloc/usable_size.stdout
@@ -1,2 +1,2 @@
 malloc: 27 bytes
-malloc_usable_size: 48 bytes
+malloc_usable_size: 40 bytes