diff --git a/test/time/day-test.js b/test/time/day-test.js
index aee69678..74ba68d8 100644
--- a/test/time/day-test.js
+++ b/test/time/day-test.js
@@ -29,7 +29,7 @@ suite.addBatch({
       assert.deepEqual(floor(utc(2011, 10, 6, 9)), local(2011, 10, 6));
       assert.deepEqual(floor(utc(2011, 10, 6, 10)), local(2011, 10, 6));
     },
-    "utc": {
+    "UTC": {
       topic: function(floor) {
         return floor.utc;
       },
diff --git a/test/time/days-test.js b/test/time/days-test.js
index f3154afd..e7b27809 100644
--- a/test/time/days-test.js
+++ b/test/time/days-test.js
@@ -41,7 +41,7 @@ suite.addBatch({
         local(2011, 10, 8)
       ]);
     },
-    "utc": {
+    "UTC": {
       topic: function(range) {
         return range.utc;
       },
diff --git a/test/time/minutes-test.js b/test/time/minutes-test.js
new file mode 100644
index 00000000..bd2305c0
--- /dev/null
+++ b/test/time/minutes-test.js
@@ -0,0 +1,85 @@
+require("../env");
+require("../../d3");
+require("../../d3.time");
+
+var vows = require("vows"),
+    assert = require("assert");
+
+var suite = vows.describe("d3.time.minutes");
+
+suite.addBatch({
+  "minutes": {
+    topic: function() {
+      return d3.time.minutes;
+    },
+    "returns minutes": function(range) {
+      assert.deepEqual(range(local(2010, 11, 31, 23, 59), local(2011, 0, 1, 0, 2)), [
+        local(2010, 11, 31, 23, 59),
+        local(2011, 0, 1, 0, 0),
+        local(2011, 0, 1, 0, 1)
+      ]);
+    },
+    "has an inclusive lower bound": function(range) {
+      assert.deepEqual(range(local(2010, 11, 31, 23, 59), local(2011, 0, 1, 0, 2))[0], local(2010, 11, 31, 23, 59));
+    },
+    "has an exclusive upper bound": function(range) {
+      assert.deepEqual(range(local(2010, 11, 31, 23, 59), local(2011, 0, 1, 0, 2))[2], local(2011, 0, 1, 0, 1));
+    },
+    "observes start of daylight savings time": function(range) {
+      assert.deepEqual(range(utc(2011, 2, 13, 9, 59), utc(2011, 2, 13, 10, 2)), [
+        utc(2011, 2, 13, 9, 59),
+        utc(2011, 2, 13, 10, 0),
+        utc(2011, 2, 13, 10, 1)
+      ]);
+    },
+    "observes end of daylight savings time": function(range) {
+      assert.deepEqual(range(utc(2011, 10, 6, 8, 59), utc(2011, 10, 6, 9, 2)), [
+        utc(2011, 10, 6, 8, 59),
+        utc(2011, 10, 6, 9, 0),
+        utc(2011, 10, 6, 9, 1)
+      ]);
+    },
+    "UTC": {
+      topic: function(range) {
+        return range.utc;
+      },
+      "returns minutes": function(range) {
+        assert.deepEqual(range(utc(2010, 11, 31, 23, 59), utc(2011, 0, 1, 0, 2)), [
+          utc(2010, 11, 31, 23, 59),
+          utc(2011, 0, 1, 0, 0),
+          utc(2011, 0, 1, 0, 1)
+        ]);
+      },
+      "has an inclusive lower bound": function(range) {
+        assert.deepEqual(range(utc(2010, 11, 31, 23, 59), utc(2011, 0, 1, 0, 2))[0], utc(2010, 11, 31, 23, 59));
+      },
+      "has an exclusive upper bound": function(range) {
+        assert.deepEqual(range(utc(2010, 11, 31, 23, 59), utc(2011, 0, 1, 0, 2))[2], utc(2011, 0, 1, 0, 1));
+      },
+      "does not observe the start of daylight savings time": function(range) {
+        assert.deepEqual(range(utc(2011, 2, 13, 9, 59), utc(2011, 2, 13, 10, 2)), [
+          utc(2011, 2, 13, 9, 59),
+          utc(2011, 2, 13, 10, 0),
+          utc(2011, 2, 13, 10, 1)
+        ]);
+      },
+      "does not observe the end of daylight savings time": function(range) {
+        assert.deepEqual(range(utc(2011, 10, 6, 8, 59), utc(2011, 10, 6, 9, 2)), [
+          utc(2011, 10, 6, 8, 59),
+          utc(2011, 10, 6, 9, 0),
+          utc(2011, 10, 6, 9, 1)
+        ]);
+      }
+    }
+  }
+});
+
+function local(year, month, day, hours, minutes, seconds) {
+  return new Date(year, month, day, hours || 0, minutes || 0, seconds || 0);
+}
+
+function utc(year, month, day, hours, minutes, seconds) {
+  return new Date(Date.UTC(year, month, day, hours || 0, minutes || 0, seconds || 0));
+}
+
+suite.export(module);
diff --git a/test/time/test-minutes.js b/test/time/test-minutes.js
deleted file mode 100644
index c16f0849..00000000
--- a/test/time/test-minutes.js
+++ /dev/null
@@ -1,30 +0,0 @@
-require("./../../lib/env-js/envjs/node");
-require("./../../d3");
-require("./../../d3.time");
-
-function parse(string) { return new Date(string); }
-function format(date) { return date.toString(); }
-
-console.log("minutes(2011-01-01T07:58:00Z, 2011-01-01T08:02:00Z):");
-d3.time.minutes(parse("2011-01-01T07:58:00Z"), parse("2011-01-01T08:02:00Z")).forEach(log);
-console.log("");
-
-console.log("minutes(2011-03-13T09:58:00Z, 2011-03-13T10:02:00Z):");
-d3.time.minutes(parse("2011-03-13T09:58:00Z"), parse("2011-03-13T10:02:00Z")).forEach(log);
-console.log("");
-
-console.log("minutes(2011-03-13T09:58:00Z, 2011-03-13T11:02:00Z, 15):");
-d3.time.minutes(parse("2011-03-13T09:58:00Z"), parse("2011-03-13T11:02:00Z"), 15).forEach(log);
-console.log("");
-
-console.log("minutes.utc(2010-12-31T23:58:00Z, 2011-01-01T00:02:00Z):");
-d3.time.minutes.utc(parse("2010-12-31T23:58:00Z"), parse("2011-01-01T00:02:00Z")).forEach(log);
-console.log("");
-
-console.log("minutes.utc(2010-12-31T23:58:00Z, 2011-01-01T01:02:00Z, 15):");
-d3.time.minutes.utc(parse("2010-12-31T23:58:00Z"), parse("2011-01-01T01:02:00Z"), 15).forEach(log);
-console.log("");
-
-function log(date) {
-  console.log("  " + format(date));
-}
diff --git a/test/time/test-minutes.out b/test/time/test-minutes.out
deleted file mode 100644
index 97132f05..00000000
--- a/test/time/test-minutes.out
+++ /dev/null
@@ -1,32 +0,0 @@
-minutes(2011-01-01T07:58:00Z, 2011-01-01T08:02:00Z):
-  Fri Dec 31 2010 23:58:00 GMT-0800 (PST)
-  Fri Dec 31 2010 23:59:00 GMT-0800 (PST)
-  Sat Jan 01 2011 00:00:00 GMT-0800 (PST)
-  Sat Jan 01 2011 00:01:00 GMT-0800 (PST)
-
-minutes(2011-03-13T09:58:00Z, 2011-03-13T10:02:00Z):
-  Sun Mar 13 2011 01:58:00 GMT-0800 (PST)
-  Sun Mar 13 2011 01:59:00 GMT-0800 (PST)
-  Sun Mar 13 2011 03:00:00 GMT-0700 (PDT)
-  Sun Mar 13 2011 03:01:00 GMT-0700 (PDT)
-
-minutes(2011-03-13T09:58:00Z, 2011-03-13T11:02:00Z, 15):
-  Sun Mar 13 2011 03:00:00 GMT-0700 (PDT)
-  Sun Mar 13 2011 03:15:00 GMT-0700 (PDT)
-  Sun Mar 13 2011 03:30:00 GMT-0700 (PDT)
-  Sun Mar 13 2011 03:45:00 GMT-0700 (PDT)
-  Sun Mar 13 2011 04:00:00 GMT-0700 (PDT)
-
-minutes.utc(2010-12-31T23:58:00Z, 2011-01-01T00:02:00Z):
-  Fri Dec 31 2010 15:58:00 GMT-0800 (PST)
-  Fri Dec 31 2010 15:59:00 GMT-0800 (PST)
-  Fri Dec 31 2010 16:00:00 GMT-0800 (PST)
-  Fri Dec 31 2010 16:01:00 GMT-0800 (PST)
-
-minutes.utc(2010-12-31T23:58:00Z, 2011-01-01T01:02:00Z, 15):
-  Fri Dec 31 2010 16:00:00 GMT-0800 (PST)
-  Fri Dec 31 2010 16:15:00 GMT-0800 (PST)
-  Fri Dec 31 2010 16:30:00 GMT-0800 (PST)
-  Fri Dec 31 2010 16:45:00 GMT-0800 (PST)
-  Fri Dec 31 2010 17:00:00 GMT-0800 (PST)
-