diff --git a/test/intl402/RelativeTimeFormat/prototype/format/en-us-numeric-auto.js b/test/intl402/RelativeTimeFormat/prototype/format/en-us-numeric-auto.js
index b123d76a17fecdc4142961fdf2a2eefba3cd4ce6..19a4b8aea728005246dc760addb0f320fed62597 100644
--- a/test/intl402/RelativeTimeFormat/prototype/format/en-us-numeric-auto.js
+++ b/test/intl402/RelativeTimeFormat/prototype/format/en-us-numeric-auto.js
@@ -30,6 +30,11 @@ const exceptions = {
     "0": "this year",
     "1": "next year",
   },
+  "quarter": {
+    "-1": "last quarter",
+    "0": "this quarter",
+    "1": "next quarter",
+  },
   "month": {
     "-1": "last month",
     "0": "this month",
diff --git a/test/intl402/RelativeTimeFormat/prototype/format/en-us-style-short.js b/test/intl402/RelativeTimeFormat/prototype/format/en-us-style-short.js
index d62341a937cdf869949962867e13a5ce67f79430..b292aadececaa996def5a08e30caae87a9e1ea71 100644
--- a/test/intl402/RelativeTimeFormat/prototype/format/en-us-style-short.js
+++ b/test/intl402/RelativeTimeFormat/prototype/format/en-us-style-short.js
@@ -9,14 +9,14 @@ locale: [en-US]
 ---*/
 
 const units = {
-  "second": "sec.",
-  "minute": "min.",
-  "hour": "hr.",
-  "day": undefined,
-  "week": "wk.",
-  "month": "mo.",
-  "quarter": "qtr.",
-  "year": "yr.",
+  "second": ["sec."],
+  "minute": ["min."],
+  "hour": ["hr."],
+  "day": ["day", "days"],
+  "week": ["wk."],
+  "month": ["mo."],
+  "quarter": ["qtr.", "qtrs."],
+  "year": ["yr."],
 };
 
 const rtf = new Intl.RelativeTimeFormat("en-US", {
@@ -25,9 +25,8 @@ const rtf = new Intl.RelativeTimeFormat("en-US", {
 
 assert.sameValue(typeof rtf.format, "function", "format should be supported");
 
-for (const [unitArgument, unitString] of Object.entries(units)) {
-  const singular = unitString || `${unitArgument}`;
-  const plural = unitString || `${unitArgument}s`;
+for (const [unitArgument, unitStrings] of Object.entries(units)) {
+  const [singular, plural = singular] = unitStrings;
   assert.sameValue(rtf.format(1000, unitArgument), `in 1,000 ${plural}`);
   assert.sameValue(rtf.format(10, unitArgument), `in 10 ${plural}`);
   assert.sameValue(rtf.format(2, unitArgument), `in 2 ${plural}`);
diff --git a/test/intl402/RelativeTimeFormat/prototype/formatToParts/en-us-numeric-auto.js b/test/intl402/RelativeTimeFormat/prototype/formatToParts/en-us-numeric-auto.js
index be604222cdc7ded7eb2684115d05176a55e01126..a7f39ae821e9d417d8e8e0a31efaedcce7e39f1d 100644
--- a/test/intl402/RelativeTimeFormat/prototype/formatToParts/en-us-numeric-auto.js
+++ b/test/intl402/RelativeTimeFormat/prototype/formatToParts/en-us-numeric-auto.js
@@ -26,6 +26,11 @@ function expected(key, unit, default_) {
       "0": "this year",
       "1": "next year",
     },
+    "quarter": {
+      "-1": "last quarter",
+      "0": "this quarter",
+      "1": "next quarter",
+    },
     "month": {
       "-1": "last month",
       "0": "this month",
diff --git a/test/intl402/RelativeTimeFormat/prototype/formatToParts/en-us-style-short.js b/test/intl402/RelativeTimeFormat/prototype/formatToParts/en-us-style-short.js
index b85809b5f5176f0166c600aa306057f57387b159..2ff39cf60864f1f3089eb7a8b8297a14a5ce4f2b 100644
--- a/test/intl402/RelativeTimeFormat/prototype/formatToParts/en-us-style-short.js
+++ b/test/intl402/RelativeTimeFormat/prototype/formatToParts/en-us-style-short.js
@@ -19,14 +19,14 @@ function verifyFormatParts(actual, expected, message) {
 }
 
 const units = {
-  "second": "sec.",
-  "minute": "min.",
-  "hour": "hr.",
-  "day": undefined,
-  "week": "wk.",
-  "month": "mo.",
-  "quarter": "qtr.",
-  "year": "yr.",
+  "second": ["sec."],
+  "minute": ["min."],
+  "hour": ["hr."],
+  "day": ["day", "days"],
+  "week": ["wk."],
+  "month": ["mo."],
+  "quarter": ["qtr.", "qtrs."],
+  "year": ["yr."],
 };
 
 const rtf = new Intl.RelativeTimeFormat("en-US", {
@@ -35,9 +35,8 @@ const rtf = new Intl.RelativeTimeFormat("en-US", {
 
 assert.sameValue(typeof rtf.formatToParts, "function", "formatToParts should be supported");
 
-for (const [unitArgument, unitString] of Object.entries(units)) {
-  const singular = unitString || `${unitArgument}`;
-  const plural = unitString || `${unitArgument}s`;
+for (const [unitArgument, unitStrings] of Object.entries(units)) {
+  const [singular, plural = singular] = unitStrings;
 
   verifyFormatParts(rtf.formatToParts(1000, unitArgument), [
     { "type": "literal", "value": "in " },