diff --git a/tests/old/testsuite/threads/Makefile.am b/tests/old/testsuite/threads/Makefile.am
index 203724bed4..fafa7dd7f5 100644
--- a/tests/old/testsuite/threads/Makefile.am
+++ b/tests/old/testsuite/threads/Makefile.am
@@ -1,8 +1,8 @@
 include ../Rules
 
 tests_pass = thread1 thread2 thread3 thread4 threadf
-tests_fail = thread5 threadb threadc threadd threade queue
-
+tests_fail = thread5 threadd threade queue
+# tests which unexpectedly pass: threadb threadc
 
 queue_SOURCES = queue.c
 queue_CFLAGS = $(AM_CFLAGS)
diff --git a/testsuite/threads/Makefile.am b/testsuite/threads/Makefile.am
index 203724bed4..fafa7dd7f5 100644
--- a/testsuite/threads/Makefile.am
+++ b/testsuite/threads/Makefile.am
@@ -1,8 +1,8 @@
 include ../Rules
 
 tests_pass = thread1 thread2 thread3 thread4 threadf
-tests_fail = thread5 threadb threadc threadd threade queue
-
+tests_fail = thread5 threadd threade queue
+# tests which unexpectedly pass: threadb threadc
 
 queue_SOURCES = queue.c
 queue_CFLAGS = $(AM_CFLAGS)