diff --git a/credentials/ssocreds/sso_cached_token_test.go b/credentials/ssocreds/sso_cached_token_test.go
index 7fd745b39bd..3c88702184a 100644
--- a/credentials/ssocreds/sso_cached_token_test.go
+++ b/credentials/ssocreds/sso_cached_token_test.go
@@ -1,6 +1,7 @@
 package ssocreds
 
 import (
+	"encoding/json"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -182,3 +183,90 @@ func TestStoreCachedToken(t *testing.T) {
 		})
 	}
 }
+
+func TestStoreTokenTimeZone(t *testing.T) {
+	tempDir, err := ioutil.TempDir(os.TempDir(), "aws-sdk-go-v2-"+t.Name())
+	if err != nil {
+		t.Fatalf("failed to create temporary test directory, %v", err)
+	}
+	defer func() {
+		if err := os.RemoveAll(tempDir); err != nil {
+			t.Errorf("failed to cleanup temporary test directory, %v", err)
+		}
+	}()
+
+	cases := map[string]struct {
+		token             token
+		filename          string
+		fileMode          os.FileMode
+		expectedExpiresAt string
+	}{
+		"utc token": {
+			filename: filepath.Join(tempDir, "token_file.json"),
+			fileMode: 0600,
+			token: token{
+				tokenKnownFields: tokenKnownFields{
+					AccessToken:  "dGhpcyBpcyBub3QgYSByZWFsIHZhbHVl",
+					ExpiresAt:    (*rfc3339)(aws.Time(time.Date(2044, 4, 4, 7, 0, 1, 0, time.UTC))),
+					ClientID:     "client id",
+					ClientSecret: "client secret",
+					RefreshToken: "refresh token",
+				},
+				UnknownFields: map[string]interface{}{
+					"unknownField":          "some value",
+					"registrationExpiresAt": "2044-04-04T07:00:01Z",
+					"region":                "region",
+					"startURL":              "start URL",
+				},
+			},
+			expectedExpiresAt: "2044-04-04T07:00:01Z",
+		},
+		"non-utc token": {
+			filename: filepath.Join(tempDir, "token_file.json"),
+			fileMode: 0600,
+			token: token{
+				tokenKnownFields: tokenKnownFields{
+					AccessToken:  "dGhpcyBpcyBub3QgYSByZWFsIHZhbHVl",
+					ExpiresAt:    (*rfc3339)(aws.Time(time.Date(2044, 4, 4, 7, 0, 1, 0, time.FixedZone("UTC-8", -8*60*60)))),
+					ClientID:     "client id",
+					ClientSecret: "client secret",
+					RefreshToken: "refresh token",
+				},
+				UnknownFields: map[string]interface{}{
+					"unknownField":          "some value",
+					"registrationExpiresAt": "2044-04-04T07:00:01Z",
+					"region":                "region",
+					"startURL":              "start URL",
+				},
+			},
+			expectedExpiresAt: "2044-04-04T15:00:01Z",
+		},
+	}
+
+	type ExpiresAt struct {
+		ExpiresAt string `json:"expiresAt"`
+	}
+
+	for name, c := range cases {
+		t.Run(name, func(t *testing.T) {
+			err := storeCachedToken(c.filename, c.token, c.fileMode)
+			if err != nil {
+				t.Fatalf("expect no error, got %v", err)
+			}
+
+			fileBytes, err := ioutil.ReadFile(c.filename)
+			if err != nil {
+				t.Fatalf("failed to load file, %v", err)
+			}
+			var expiresAtData ExpiresAt
+			err = json.Unmarshal(fileBytes, &expiresAtData)
+			if err != nil {
+				t.Fatalf("failed to unmarshal expiresAt, %v", err)
+			}
+
+			if expiresAtData.ExpiresAt != c.expectedExpiresAt {
+				t.Errorf("expect %v, got %v", c.expectedExpiresAt, expiresAtData.ExpiresAt)
+			}
+		})
+	}
+}