diff --git a/glances/secure.py b/glances/secure.py
index 2eb671d8..4dd177e0 100644
--- a/glances/secure.py
+++ b/glances/secure.py
@@ -9,10 +9,11 @@
 
 """Secures functions for Glances"""
 
-from glances.globals import nativestr
 from subprocess import Popen, PIPE
 import re
 
+from glances.globals import nativestr
+
 
 def secure_popen(cmd):
     """A more or less secure way to execute system commands
@@ -54,8 +55,10 @@ def __secure_popen(cmd):
         sub_cmd_split = [_[1:-1] if (_[0] == _[-1] == '"') or (_[0] == _[-1] == '\'') else _ for _ in tmp_split]
         p = Popen(sub_cmd_split, shell=False, stdin=sub_cmd_stdin, stdout=PIPE, stderr=PIPE)
         if p_last is not None:
-            p_last.wait()
+            # Allow p_last to receive a SIGPIPE if p exits.
             p_last.stdout.close()
+            p_last.kill()
+            p_last.wait()
         p_last = p
         sub_cmd_stdin = p.stdout
 
diff --git a/unitest.py b/unitest.py
index 206c850a..c51a658a 100755
--- a/unitest.py
+++ b/unitest.py
@@ -33,7 +33,6 @@ from glances.plugins.plugin.model import GlancesPluginModel
 from glances.programs import processes_to_programs
 from glances.secure import secure_popen
 
-
 # Global variables
 # =================