diff --git a/server/server_test.go b/server/server_test.go
index 312bb13697ff7..c5364cdf88d20 100644
--- a/server/server_test.go
+++ b/server/server_test.go
@@ -724,6 +724,22 @@ func TestGetClaims(t *testing.T) {
 				UserInfoCacheExpiration: "5m",
 			},
 		},
+		{
+			test: "GetClaimsWithGroupsString",
+			claims: jwt.MapClaims{
+				"aud":    common.ArgoCDClientAppID,
+				"exp":    defaultExpiry,
+				"sub":    "randomUser",
+				"groups": "group1",
+			},
+			expectedErrorContains: "",
+			expectedClaims: jwt.MapClaims{
+				"aud":    common.ArgoCDClientAppID,
+				"exp":    defaultExpiryUnix,
+				"sub":    "randomUser",
+				"groups": "group1",
+			},
+		},
 	}
 
 	for _, testData := range tests {