diff --git a/tests/ecc-517.sh b/tests/ecc-517.sh
index 45b11c8bd..555643241 100755
--- a/tests/ecc-517.sh
+++ b/tests/ecc-517.sh
@@ -10,8 +10,16 @@
 
 . ./include.sh
 
-# The program produces a BUFR file as output
 OUTPUT=temp.ecc-517.bufr
+TEMP=temp.ecc-517.txt
+
+# Run program to create output BUFR file with replication
 ${test_dir}/ecc-517 $OUTPUT
 
-rm $OUTPUT
+# Check file is OK and has the expected number of descriptors
+${tools_dir}/bufr_dump -jf $OUTPUT > $TEMP
+count=`grep -c extendedVerticalSoundingSignificance $TEMP`
+[ $count -eq 487 ] 
+
+
+rm $OUTPUT $TEMP