diff --git a/cli/command/container/list.go b/cli/command/container/list.go
index 3571954b5..471e4e1c4 100644
--- a/cli/command/container/list.go
+++ b/cli/command/container/list.go
@@ -120,6 +120,8 @@ func runPs(dockerCli command.Cli, options *psOptions) error {
 	if len(options.format) == 0 {
 		// load custom psFormat from CLI config (if any)
 		options.format = dockerCli.ConfigFile().PsFormat
+	} else if options.quiet {
+		_, _ = dockerCli.Err().Write([]byte("WARNING: Ignoring custom format, because both --format and --quiet are set.\n"))
 	}
 
 	listOptions, err := buildContainerListOptions(options)
diff --git a/cli/command/container/list_test.go b/cli/command/container/list_test.go
index a071b2e30..a00783775 100644
--- a/cli/command/container/list_test.go
+++ b/cli/command/container/list_test.go
@@ -324,6 +324,7 @@ func TestContainerListWithFormat(t *testing.T) {
 		assert.Check(t, cmd.Flags().Set("format", "{{ .Names }} {{ .Image }} {{ .Labels }}"))
 		assert.Check(t, cmd.Flags().Set("quiet", "true"))
 		assert.NilError(t, cmd.Execute())
+		assert.Equal(t, cli.ErrBuffer().String(), "WARNING: Ignoring custom format, because both --format and --quiet are set.\n")
 		golden.Assert(t, cli.OutBuffer().String(), "container-list-quiet.golden")
 	})
 }