diff --git a/test_problems/cathermo/DH_graph_1/runtest b/test_problems/cathermo/DH_graph_1/runtest
index eab6203ec..9a6a5043d 100755
--- a/test_problems/cathermo/DH_graph_1/runtest
+++ b/test_problems/cathermo/DH_graph_1/runtest
@@ -46,6 +46,8 @@ fi
 ##########################################################################
 if test $temp_success = "0" ; then
   echo "PASSED" > csvCode.txt
+  return 0
 else
   echo "FAILED" > csvCode.txt
+  return 1
 fi
diff --git a/test_problems/cathermo/DH_graph_NM/runtest b/test_problems/cathermo/DH_graph_NM/runtest
index 104cdfdd8..420212925 100755
--- a/test_problems/cathermo/DH_graph_NM/runtest
+++ b/test_problems/cathermo/DH_graph_NM/runtest
@@ -32,9 +32,11 @@ diff DH_NaCl_NM.csv DH_NaCl_NM_blessed.csv > output.txt
 zres=$?
 if test "$zres" = "0"  -a "$retnStat" = "0"; then
   echo "successful diff comparison on $prog NM  test"
+  return 0
 else
   echo "unsuccessful diff comparison on $prog NM test"
   echo "FAILED" > csvCode.txt
   temp_success="0"
+  return 1
 fi
 
diff --git a/test_problems/cathermo/DH_graph_Pitzer/runtest b/test_problems/cathermo/DH_graph_Pitzer/runtest
index 977c5b988..8efb10075 100755
--- a/test_problems/cathermo/DH_graph_Pitzer/runtest
+++ b/test_problems/cathermo/DH_graph_Pitzer/runtest
@@ -32,9 +32,11 @@ diff DH_NaCl_Pitzer.csv DH_NaCl_Pitzer_blessed.csv > output.txt
 zres=$?
 if test "$zres" = "0"  -a "$retnStat" = "0"; then
   echo "successful diff comparison on $prog Pitzer test"
+  return 0
 else
   echo "unsuccessful diff comparison on $prog Pitzer test"
   echo "FAILED" > csvCode.txt
   temp_success="0"
+  return 1
 fi
 
diff --git a/test_problems/cathermo/DH_graph_acommon/runtest b/test_problems/cathermo/DH_graph_acommon/runtest
index 08a052cb8..5d98da1d3 100755
--- a/test_problems/cathermo/DH_graph_acommon/runtest
+++ b/test_problems/cathermo/DH_graph_acommon/runtest
@@ -32,9 +32,11 @@ diff DH_NaCl_acommon.csv DH_NaCl_acommon_blessed.csv > output.txt
 zres=$?
 if test "$zres" = "0"  -a "$retnStat" = "0"; then
   echo "successful diff comparison on $prog _acommon test"
+  return 0
 else
   echo "unsuccessful diff comparison on $prog _acommon test"
   echo "FAILED" > csvCode.txt
   temp_success="0"
+  return 1
 fi
 
diff --git a/test_problems/cathermo/DH_graph_bdotak/runtest b/test_problems/cathermo/DH_graph_bdotak/runtest
index 156aeb5d4..e5f3d5cf7 100755
--- a/test_problems/cathermo/DH_graph_bdotak/runtest
+++ b/test_problems/cathermo/DH_graph_bdotak/runtest
@@ -32,9 +32,11 @@ diff DH_NaCl_bdotak.csv DH_NaCl_bdotak_blessed.csv > output.txt
 zres=$?
 if test "$zres" = "0"  -a "$retnStat" = "0"; then
   echo "successful diff comparison on $prog bdotak test"
+  return 0
 else
   echo "unsuccessful diff comparison on $prog bdotak test"
   echo "FAILED" > csvCode.txt
   temp_success="0"
+  return 1
 fi
 
diff --git a/test_problems/cathermo/HMW_dupl_test/runtest b/test_problems/cathermo/HMW_dupl_test/runtest
index a85fe7f7b..522e697ea 100755
--- a/test_problems/cathermo/HMW_dupl_test/runtest
+++ b/test_problems/cathermo/HMW_dupl_test/runtest
@@ -34,9 +34,11 @@ retnStat=$?
 if [ $retnStat = "0" ]
 then
   echo "successful diff comparison on $prog test"
+  return 0
 else
   echo "unsuccessful diff comparison on $prog test"
   echo "FAILED" > csvCode.txt
   temp_success="0"
+  return 1
 fi