diff --git a/test.js b/test.js
index acd4ea7..180fc95 100644
--- a/test.js
+++ b/test.js
@@ -6,7 +6,7 @@ function testUtcToTz(t) {
   var result = TZ.toTimeZone.apply(TZ, t.inputs).toISOString();
   if (t.result !== result) {
     throw new Error(
-      `Invalid UTC to TZ conversion for ${t.desc}:\n` +
+      `Invalid UTC/ISO+Offset to TZ conversion for ${t.desc}:\n` +
         `\tExpected: ${t.result}\n` +
         `\tActual: ${result}\n`
     );
@@ -44,23 +44,23 @@ function testTzToUtc(t) {
 
   // 12:15am NY -0500 => -0400
   {
-    desc: "UTC to 12:15am NY EST",
+    desc: "UTC Zulu to 12:15am NY EST",
     inputs: ["2021-03-14T05:15:59.000Z", "America/New_York"],
     result: "2021-03-14T00:15:59.000-0500",
   },
   {
-    desc: "UTC to 12:15am NY EST (2)",
+    desc: "ISO+Offset to 12:15am NY EST (2)",
     inputs: ["2021-03-14T00:15:59.000-0500", "America/New_York"],
     result: "2021-03-14T00:15:59.000-0500",
   },
   // 1:15am NY (non-DST)
   {
-    desc: "UTC to 1:15am NY EST",
+    desc: "UTC Zulu to 1:15am NY EST",
     inputs: ["2021-03-14T06:15:59.000Z", "America/New_York"],
     result: "2021-03-14T01:15:59.000-0500",
   },
   {
-    desc: "UTC to 1:15am NY EST (2)",
+    desc: "ISO+Offset to 1:15am NY EST (2)",
     inputs: ["2021-03-14T01:15:59.000-0500", "America/New_York"],
     result: "2021-03-14T01:15:59.000-0500",
   },
@@ -69,23 +69,23 @@ function testTzToUtc(t) {
 
   // 3:15am NY (DST)
   {
-    desc: "UTC to 3:15am NY EDT",
+    desc: "UTC Zulu to 3:15am NY EDT",
     inputs: ["2021-03-14T07:15:59.000Z", "America/New_York"],
     result: "2021-03-14T03:15:59.000-0400",
   },
   {
-    desc: "UTC to 3:15am NY EDT (2)",
+    desc: "ISO+Offset to 3:15am NY EDT (2)",
     inputs: ["2021-03-14T03:15:59.000-0400", "America/New_York"],
     result: "2021-03-14T03:15:59.000-0400",
   },
   // 4:15am NY
   {
-    desc: "UTC to 4:15am NY EDT",
+    desc: "UTC Zulu to 4:15am NY EDT",
     inputs: ["2021-03-14T08:15:59.000Z", "America/New_York"],
     result: "2021-03-14T04:15:59.000-0400",
   },
   {
-    desc: "UTC to 4:15am NY EDT (2)",
+    desc: "ISO+Offset to 4:15am NY EDT (2)",
     inputs: ["2021-03-14T04:15:59.000-0400", "America/New_York"],
     result: "2021-03-14T04:15:59.000-0400",
   },
@@ -106,57 +106,57 @@ function testTzToUtc(t) {
 
   // 12:15am NY -0400 => -0500
   {
-    desc: "UTC to 2021 Nov 7, 12:15am NY EDT",
+    desc: "UTC Zulu to 2021 Nov 7, 12:15am NY EDT",
     inputs: ["2021-11-07T04:15:59.000Z", "America/New_York"],
     result: "2021-11-07T00:15:59.000-0400",
   },
   {
-    desc: "UTC to 2021 Nov 7, 12:15am NY EDT (2)",
+    desc: "ISO+Offset to 2021 Nov 7, 12:15am NY EDT (2)",
     inputs: ["2021-11-07T00:15:59.000-0400", "America/New_York"],
     result: "2021-11-07T00:15:59.000-0400",
   },
   // 1:15am NY (DST) -0400
   // NOTE: 1:15am happens TWICE (with different offsets)
   {
-    desc: "UTC to 2021 Nov 7, 1:15am NY EDT",
+    desc: "UTC Zulu to 2021 Nov 7, 1:15am NY EDT",
     inputs: ["2021-11-07T05:15:59.000Z", "America/New_York"],
     result: "2021-11-07T01:15:59.000-0400",
   },
   {
-    desc: "UTC to 2021 Nov 7, 1:15am NY EDT (2)",
+    desc: "ISO+Offset to 2021 Nov 7, 1:15am NY EDT (2)",
     inputs: ["2021-11-07T01:15:59.000-0400", "America/New_York"],
     result: "2021-11-07T01:15:59.000-0400",
   },
   // 1:15am NY (non-DST) -0500
   {
-    desc: "UTC to 2021 Nov 7, 1:15am NY EST",
+    desc: "UTC Zulu to 2021 Nov 7, 1:15am NY EST",
     inputs: ["2021-11-07T06:15:59.000Z", "America/New_York"],
     result: "2021-11-07T01:15:59.000-0500",
   },
   {
-    desc: "UTC to 2021 Nov 7, 1:15am NY EST (2)",
+    desc: "ISO+Offset to 2021 Nov 7, 1:15am NY EST (2)",
     inputs: ["2021-11-07T01:15:59.000-0500", "America/New_York"],
     result: "2021-11-07T01:15:59.000-0500",
   },
   // 2:15am NY -0500
   {
-    desc: "UTC to 2021 Nov 7, 2:15am NY EST",
+    desc: "UTC Zulu to 2021 Nov 7, 2:15am NY EST",
     inputs: ["2021-11-07T07:15:59.000Z", "America/New_York"],
     result: "2021-11-07T02:15:59.000-0500",
   },
   {
-    desc: "UTC to 2021 Nov 7, 2:15am NY EST (2)",
+    desc: "ISO+Offset to 2021 Nov 7, 2:15am NY EST (2)",
     inputs: ["2021-11-07T02:15:59.000-0500", "America/New_York"],
     result: "2021-11-07T02:15:59.000-0500",
   },
   // 3:15am NY
   {
-    desc: "UTC to 2021 Nov 7, 3:15am NY EST",
+    desc: "UTC Zulu to 2021 Nov 7, 3:15am NY EST",
     inputs: ["2021-11-07T08:15:59.000Z", "America/New_York"],
     result: "2021-11-07T03:15:59.000-0500",
   },
   {
-    desc: "UTC to 2021 Nov 7, 3:15am NY EST (2)",
+    desc: "ISO+Offset to 2021 Nov 7, 3:15am NY EST (2)",
     inputs: ["2021-11-07T03:15:59.000-0500", "America/New_York"],
     result: "2021-11-07T03:15:59.000-0500",
   },
@@ -167,27 +167,27 @@ function testTzToUtc(t) {
 
   // Colombo +0530 (not DST)
   {
-    desc: "UTC to Asia/Colombo (1)",
+    desc: "UTC Zulu to Asia/Colombo (1)",
     inputs: ["2021-03-14T08:15:59.000Z", "Asia/Colombo"],
     result: "2021-03-14T13:45:59.000+0530",
   },
   {
-    desc: "UTC to Asia/Colombo (2)",
+    desc: "ISO+Offset to Asia/Colombo (2)",
     inputs: ["2021-03-14T13:45:59.000+0530", "Asia/Colombo"],
     result: "2021-03-14T13:45:59.000+0530",
   },
   {
-    desc: "UTC to Asia/Colombo (3)",
+    desc: "UTC Zulu to Asia/Colombo (3)",
     inputs: ["2021-11-07T08:15:59.000Z", "Asia/Colombo"],
     result: "2021-11-07T13:45:59.000+0530",
   },
   {
-    desc: "UTC to Asia/Colombo (4)",
+    desc: "ISO+Offset to Asia/Colombo (4)",
     inputs: ["2021-11-07T13:45:59.000+0530", "Asia/Colombo"],
     result: "2021-11-07T13:45:59.000+0530",
   },
 ].forEach(testUtcToTz);
-console.info("Pass: UTC to TZ for America/New_York and Asia/Colombo");
+console.info("Pass: UTC/ISO+Offset to TZ for America/New_York and Asia/Colombo");
 
 [
   //