diff --git a/t/lib-credential.sh b/t/lib-credential.sh
index 3c43ff11b3..957ae936e8 100755
--- a/t/lib-credential.sh
+++ b/t/lib-credential.sh
@@ -18,10 +18,6 @@ check() {
 		cat stderr &&
 		false
 	fi &&
-	if test_have_prereq MINGW
-	then
-		dos2unix -q stderr
-	fi &&
 	test_cmp expect-stdout stdout &&
 	test_cmp expect-stderr stderr
 }
diff --git a/t/t7407-submodule-foreach.sh b/t/t7407-submodule-foreach.sh
index be93f10cf0..b64c9ed8e7 100755
--- a/t/t7407-submodule-foreach.sh
+++ b/t/t7407-submodule-foreach.sh
@@ -254,10 +254,6 @@ test_expect_success 'ensure "status --cached --recursive" preserves the --cached
 		) &&
 		git submodule status --cached --recursive -- nested1 > ../actual
 	) &&
-	if test_have_prereq MINGW
-	then
-		dos2unix actual
-	fi &&
 	test_cmp expect actual
 '
 
diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh
index 2813aa9a61..3119c8c523 100755
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -23,7 +23,6 @@ test_expect_success $PREREQ \
       echo do
       echo "  echo \"!\$a!\""
       echo "done >commandline\$output"
-      test_have_prereq MINGW && echo "dos2unix commandline\$output"
       echo "cat > msgtxt\$output"
       ) >fake.sendmail &&
      chmod +x ./fake.sendmail &&