Index: dap4_test/test_data.sh
--- dap4_test/test_data.sh.orig
+++ dap4_test/test_data.sh
@@ -23,7 +23,7 @@ for f in $F ; do
     fi
     ${NCDUMP} ./results_test_data/${f}.nc > ./results_test_data/${f}.d4d
     if test "x${TEST}" = x1 ; then
-	diff -wBb ${BASELINE}/${f}.d4d ./results_test_data/${f}.d4d
+	gdiff -wBb ${BASELINE}/${f}.d4d ./results_test_data/${f}.d4d
     elif test "x${RESET}" = x1 ; then
 	echo "${f}:"
 	cp ./results_test_data/${f}.d4d ${BASELINE}/${f}.d4d
@@ -77,13 +77,13 @@ if test "x${CDLDIFF}" = x1 ; then
       echo "Not found: ${CDLTESTFILES}/${STEM}.cdl"
       continue
     fi
-    echo "diff -wBb ${CDLTESTFILES}/${STEM}.cdl ./results_test_data/${f}.d4d"
+    echo "gdiff -wBb ${CDLTESTFILES}/${STEM}.cdl ./results_test_data/${f}.d4d"
     rm -f ./b1 ./b2 ./r1 ./r2
     trim ${CDLTESTFILES}/${STEM}.cdl ./b1
     trim ./results_test_data/${f}.d4d ./r1
     baseclean b1 b2
     resultclean r1 r2
-    diff -wBb ./b2 ./r2
+    gdiff -wBb ./b2 ./r2
   done
 fi