update error message for multistringflag Set and update unit test

2 files changed, 2 insertions, 2 deletions

diff --git a/multi_string_flag.go b/multi_string_flag.go
index 1dd76b28..699529a0 100644
--- a/multi_string_flag.go
+++ b/multi_string_flag.go
@@ -5,7 +5,7 @@ import (
 	"strings"
 )
 
-var errMultiStringSetEmptyValue = errors.New("set value cannot be empty")
+var errMultiStringSetEmptyValue = errors.New("value cannot be empty")
 
 // MultiStringFlag implements the flag.Value interface and allows a string flag
 // to be specified multiple times on the command line.
diff --git a/multi_string_flag_test.go b/multi_string_flag_test.go
index cca0fd05..5cddac98 100644
--- a/multi_string_flag_test.go
+++ b/multi_string_flag_test.go
@@ -16,7 +16,7 @@ func TestMultiStringFlagAppendsOnSet(t *testing.T) {
 	require.NoError(t, iface.Set("foo"))
 	require.NoError(t, iface.Set("bar"))
 
-	require.Error(t, iface.Set(""), errMultiStringSetEmptyValue)
+	require.EqualError(t, iface.Set(""), "value cannot be empty")
 
 	require.Equal(t, MultiStringFlag{"foo", "bar"}, concrete)
 }