diff --git a/test/t4205-full-deps6.sh b/test/t4205-full-deps6.sh
index f351d7cb4..974112a9b 100755
--- a/test/t4205-full-deps6.sh
+++ b/test/t4205-full-deps6.sh
@@ -45,7 +45,7 @@ touch foo.c bar.c
 update
 
 if [ "$in_windows" = "1" ]; then
-	prefix="`echo $PWD | sed 's,/cygdrive/c,c:,'`"
+	prefix="`echo $PWD | sed 's,/c,c:,'`"
 else
 	prefix="$PWD"
 fi
diff --git a/test/t4208-full-deps-external.sh b/test/t4208-full-deps-external.sh
index 495b0de29..b6636157b 100755
--- a/test/t4208-full-deps-external.sh
+++ b/test/t4208-full-deps-external.sh
@@ -55,7 +55,7 @@ HERE
 update
 
 if [ "$in_windows" = "1" ]; then
-	prefix="`echo $root | sed 's,/cygdrive/c,c:,'`"
+	prefix="`echo $root | sed 's,/c,c:,'`"
 else
 	prefix="$root"
 fi