diff --git a/ellipsyswrapper/testsuite.py b/ellipsyswrapper/testsuite.py
index ba63d33322965ebaa6cfcc281dd101abe9916b03..fb6065127010b449b50b8c2410027da16a2b8619 100644
--- a/ellipsyswrapper/testsuite.py
+++ b/ellipsyswrapper/testsuite.py
@@ -178,26 +178,32 @@ class CaseRunner(object):
             exepath = os.path.join(epath, self.flowfield)
             command = 'mpirun -np %i python %s' % (self.nprocs, exepath)
             # out = commands.getoutput(command)
-            status = subprocess.call(command, shell=True)
-            if status != 0:
-                raise RuntimeError('Case %s failed!' % self.casename)
-             # if self.debug:
-             #     print 'out', out
+            if self.debug:
+              status = subprocess.call(command, shell=True)
+            else:
+              # Suppress output from EllipSys
+              FNULL = open(os.devnull, 'w')
+              status = subprocess.call(command, shell=True,stdout=FNULL)
             self.read_data(self.project, outname)
             self.jobid = None
+            print 'test1'
             print 'case %s ran in %f seconds' %(self.casename, time.time() - t0)
         elif self.exec_mode == 'shell':
             t0 = time.time()
             exepath = os.path.join(epath, self.flowfield)
             command = 'mpirun -np %i %s' % (self.nprocs, exepath)
-            status = subprocess.call(command, shell=True)
+            if self.debug:
+              status = subprocess.call(command, shell=True)
+            else:
+              # Suppress output from EllipSys
+              FNULL = open(os.devnull, 'w')
+              status = subprocess.call(command, shell=True,stdout=FNULL)
             # status, out = commands.getstatusoutput(command)
             if status != 0:
                 raise RuntimeError('Case %s failed!' % self.casename)
-            # elif self.debug:
-            #     print out
             self.read_data(self.project, outname)
             self.jobid = None
+            print 'test2'
             print 'case %s ran in %f seconds' %(self.casename, time.time() - t0)
         elif self.exec_mode == 'dry_run':
             print 'Running in dry run mode, copying pre-computed data!'