diff --git gdb/testsuite/gdb.base/readline.exp gdb/testsuite/gdb.base/readline.exp
index 2acc664..538dcc6 100644
--- gdb/testsuite/gdb.base/readline.exp
+++ gdb/testsuite/gdb.base/readline.exp
@@ -17,6 +17,9 @@
 
 # This file is part of the gdb testsuite.
 
+untested "<http://www.gnu.org/software/hurd/open_issues/term_blocking.html>"
+return -1
+
 #
 # Tests for readline operations.
 #
diff --git gdb/testsuite/gdb.base/sigall.exp gdb/testsuite/gdb.base/sigall.exp
index 4bd0427..b49fe5b 100644
--- gdb/testsuite/gdb.base/sigall.exp
+++ gdb/testsuite/gdb.base/sigall.exp
@@ -13,6 +13,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+untested "takes ages: nearly all FAIL with timeout"
+return -1
+
 if [target_info exists gdb,nosignals] {
     verbose "Skipping sigall.exp because of nosignals."
     continue
diff --git gdb/testsuite/gdb.python/py-inferior.exp gdb/testsuite/gdb.python/py-inferior.exp
index ceb0da7..ba98aa8 100644
--- gdb/testsuite/gdb.python/py-inferior.exp
+++ gdb/testsuite/gdb.python/py-inferior.exp
@@ -66,6 +66,9 @@ gdb_breakpoint check_threads
 gdb_continue_to_breakpoint "cont to check_threads" ".*pthread_barrier_wait.*"
 gdb_test "python print (len (i0.threads ()))" "\r\n9" "test Inferior.threads 2"
 
+untested "the following tests get the system into an unresponsive state"
+return -1
+
 # Proceed to the next test.
 
 gdb_breakpoint [gdb_get_line_number "Break here."]