diff --git a/test/asm/test.sh b/test/asm/test.sh
index 33edcd2054..46a8e4a0be 100755
--- a/test/asm/test.sh
+++ b/test/asm/test.sh
@@ -30,7 +30,7 @@ RGBASM=../../rgbasm
 RGBLINK=../../rgblink
 
 tryDiff () {
-	if ! diff -u --strip-trailing-cr "$1" "$2"; then
+	if ! diff -au "$1" "$2"; then
 		echo "${bold}${red}${i%.asm}${variant}.$3 mismatch!${rescolors}${resbold}"
 		false
 	fi
diff --git a/test/fix/test.sh b/test/fix/test.sh
index 360ef7585f..1c13d497ec 100755
--- a/test/fix/test.sh
+++ b/test/fix/test.sh
@@ -25,7 +25,7 @@ rescolors="$(tput op)"
 RGBFIX=./rgbfix
 
 tryDiff () {
-	if ! diff -u --strip-trailing-cr "$1" "$2"; then
+	if ! diff -au "$1" "$2"; then
 		echo "${bold}${red}${3:-$1} mismatch!${rescolors}${resbold}"
 		false
 	fi
diff --git a/test/gfx/test.sh b/test/gfx/test.sh
index 3b54f03430..71d65e6c8d 100755
--- a/test/gfx/test.sh
+++ b/test/gfx/test.sh
@@ -83,7 +83,7 @@ for f in *.png; do
 	newTest "$RGBGFX" $flags "$f"
 	if [[ -e "${f%.png}.err" ]]; then
 		runTest 2>"$errtmp"
-		diff -u --strip-trailing-cr "${f%.png}.err" "$errtmp" || failTest
+		diff -au "${f%.png}.err" "$errtmp" || failTest
 	else
 		runTest && checkOutput "${f%.png}" || failTest $?
 	fi
@@ -91,7 +91,7 @@ for f in *.png; do
 	newTest "$RGBGFX" $flags - "<$f"
 	if [[ -e "${f%.png}.err" ]]; then
 		runTest 2>"$errtmp"
-		diff -u --strip-trailing-cr <(sed "s/$f/<stdin>/g" "${f%.png}.err") "$errtmp" || failTest
+		diff -au <(sed "s/$f/<stdin>/g" "${f%.png}.err") "$errtmp" || failTest
 	else
 		runTest && checkOutput "${f%.png}" || failTest $?
 	fi
diff --git a/test/link/test.sh b/test/link/test.sh
index 4e3a07f94e..4a56c00973 100755
--- a/test/link/test.sh
+++ b/test/link/test.sh
@@ -38,7 +38,7 @@ continueTest () {
 }
 
 tryDiff () {
-	if ! diff -u --strip-trailing-cr "$1" "$2"; then
+	if ! diff -au "$1" "$2"; then
 		echo "${bold}${red}$1 mismatch!${rescolors}${resbold}"
 		false
 	fi