diff --git a/test/t4.tst b/test/t4.tst
index 85c53d4..a53adb3 100644
--- a/test/t4.tst
+++ b/test/t4.tst
@@ -45,6 +45,70 @@ do
 	done
 done
 
+#
+# Test Segmented Global Dedupe
+#
+
+echo "#################################################"
+echo "# Test Segmented Global Deduplication"
+echo "#################################################"
+
+#
+# Select a large file from the list
+#
+tstf=
+tsz=0
+for tf in `cat files.lst`
+do
+	sz=`ls -l ${tf} | awk '{ print $5 }'`
+	if [ $sz -gt $tsz ]
+	then
+		tsz=$sz
+		tstf="$tf"
+	fi
+done
+
+#
+# Compute minimum index memory needed for segmented dedupe
+# sizeof (hash_entry_t) = 20 + sizeof (CRC64) = 28 
+# Each hashtable slot ptr = 8bytes
+# Total: 28 + 8 = 36
+# Segment size = 833848
+# 25 Similarity indicators per segment, each needing one hash_entry_t
+#
+nsegs=$((tsz / 833848 + 1))
+nmem=$((nsegs * 25 * 36))
+mem_mb=$((nmem / 1048576 + 1))
+
+#
+# Now run Global Dedupe with index memory set to force segmented dedupe mechanism
+#
+export PCOMPRESS_INDEX_MEM=${mem_mb}
+cmd="../../pcompress -G -c lz4 -l1 -P -s50m $tstf"
+echo "Running $cmd"
+eval $cmd
+if [ $? -ne 0 ]
+then
+	echo "FATAL: Compression errored."
+	rm -f ${tstf}.pz
+	exit
+fi
+cmd="../../pcompress -d ${tstf}.pz ${tstf}.1"
+echo "Running $cmd"
+eval $cmd
+if [ $? -ne 0 ]
+then
+	echo "FATAL: Decompression errored."
+	rm -f ${tstf}.pz ${tstf}.1
+	exit
+fi
+diff ${tstf} ${tstf}.1 > /dev/null
+if [ $? -ne 0 ]
+then
+	echo "FATAL: Decompression was not correct"
+fi
+rm -f ${tstf}.pz ${tstf}.1
+
 echo "#################################################"
 echo ""
 
diff --git a/test/t9.tst b/test/t9.tst
index 3f345db..f21945b 100644
--- a/test/t9.tst
+++ b/test/t9.tst
@@ -21,6 +21,17 @@ do
 	fi
 done
 
+export PCOMPRESS_CHUNK_HASH_GLOBAL=CRC64
+cmd="../../pcompress -G -c none -l1 -s10m $tstf"
+echo "Running $cmd"
+eval $cmd
+if [ $? -eq 0 ]
+then
+	echo "FATAL: Compression DID NOT ERROR where expected"
+	rm -f ${tstf}.pz
+fi
+unset PCOMPRESS_CHUNK_HASH_GLOBAL
+
 for feat in "-L" "-L -D" "-L -D -E" "-L -B5" "-L -D -E -B2" "-F" "-F -L"
 do
 	cmd="../../pcompress -c dummy -l4 -s1m $feat $tstf"
@@ -30,9 +41,9 @@ do
 	then
 		echo "FATAL: Compression DID NOT ERROR where expected"
 		rm -f ${tstf}.pz
+		break
 	fi
 	rm -f ${tstf}.pz
-	break
 done
 
 for feat in "-B8 -s2m -l1" "-B0 -s2m -l1" "-D -s10k -l1" "-D -F -s2m -l1" "-p -e AES -s2m -l1" "-s2m -l15" "-e AES -k64" "-e SALSA20 -k8" "-e AES -k8" "-e SALSA20 -k64"
@@ -46,9 +57,9 @@ do
 		then
 			echo "FATAL: Compression DID NOT ERROR where expected"
 			rm -f ${tstf}.pz
+			break
 		fi
 		rm -f ${tstf}.pz
-		break
 	done
 done