diff --git a/cmd/car/filter.go b/cmd/car/filter.go
index d4c6c1d..bbc2edb 100644
--- a/cmd/car/filter.go
+++ b/cmd/car/filter.go
@@ -21,8 +21,8 @@ func FilterCar(c *cli.Context) error {
 	var err error
 	// Get the set of CIDs from stdin.
 	inStream := os.Stdin
-	if c.IsSet("cidFile") {
-		inStream, err = os.Open(c.String("cidFile"))
+	if c.IsSet("cid-file") {
+		inStream, err = os.Open(c.String("cid-file"))
 		if err != nil {
 			return err
 		}
@@ -38,7 +38,7 @@ func FilterCar(c *cli.Context) error {
 		fmt.Printf("filtering to %d cids\n", len(cidMap))
 	}
 
-	return lib.FilterCar(c.Context, c.Args().First(), c.Args().Get(1), cidMap, c.Bool("invert"), c.Int("version"), c.Bool("append"))
+	return lib.FilterCar(c.Context, c.Args().First(), c.Args().Get(1), cidMap, c.Bool("inverse"), c.Int("version"), c.Bool("append"))
 }
 
 func parseCIDS(r io.Reader) (map[cid.Cid]struct{}, error) {
diff --git a/cmd/car/testdata/script/filter.txt b/cmd/car/testdata/script/filter.txt
index 0c0b12d..6e22d44 100644
--- a/cmd/car/testdata/script/filter.txt
+++ b/cmd/car/testdata/script/filter.txt
@@ -21,6 +21,17 @@ car filter -append ${INPUTS}/sample-wrapped-v2.car out.car
 car list out.car
 stdout -count=4 '^bafy'
 
+# --cid-file arg
+car filter --cid-file filtersimpleunixfs.txt ${INPUTS}/simple-unixfs.car out.car
+stderr 'warning: no roots defined after filtering'
+car list out.car
+stdout -count=2 '^Qm'
+
+# --cid-file and --inverse args
+car filter --cid-file filtersimpleunixfs.txt --inverse ${INPUTS}/simple-unixfs.car out.car
+! stderr .
+car list out.car
+stdout -count=20 '^Qm'
 
 -- filteredcids.txt --
 bafy2bzacebohz654namrgmwjjx4qmtwgxixsd7pn4tlanyrc3g3hwj75hlxrw
@@ -28,3 +39,6 @@ bafy2bzaceaqtiesyfqd2jibmofz22oolguzf5wscwh73rmeypglfu2xhkptri
 bafy2bzacebct3dm7izgyauijzkaf3yd7ylni725k66rq7dfp3jr5ywhpprj3k
 -- filteredroot.txt --
 bafy2bzaced4ueelaegfs5fqu4tzsh6ywbbpfk3cxppupmxfdhbpbhzawfw5oy
+-- filtersimpleunixfs.txt --
+QmazwWa2vNLpy6WDBMjx7neWMbmn2oi9LQzCjan4kcGjBX
+QmVKt1VVkgfYcbSZqLD9sxZAkDpbH3L7RM6mJ6LHbkj5Bm
\ No newline at end of file