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   "css/vendor-imports/mozilla/mozilla-central-reftests/css21/pagination/reftest.list": [
    "c214096cd0af8a9f769544aed1245644a8e954c4",
    "support"
   ],
   "css/vendor-imports/mozilla/mozilla-central-reftests/css21/reftest.list": [
    "d8774423bef429b2cd1ab7167b15c786ddea0165",
@@ -544736,21 +544747,21 @@
    "e4c519e59544140de558aff7b13b6ac3e19651c8",
    "support"
   ],
   "css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/moz-multicol3-column-balancing-break-inside-avoid-1.html": [
    "4a68c1461a5ffecb87ee8f780bd37f53c9c7508b",
    "manual"
   ],
   "css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/multicol-height-002.xht": [
-   "15988661cfe37abd0c3e8e26238b8b5c6c74ea5e",
+   "46fd36d04284c70506e8d8cf0ee0311c14a3f9f3",
    "reftest"
   ],
   "css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/reference/multicol-height-002.xht": [
-   "a2d8c2ad7f3a817197cecf34385547d909119820",
+   "30d0428647c64f8d4a56f36748a6dcc0eb90e25d",
    "support"
   ],
   "css/vendor-imports/mozilla/mozilla-central-reftests/multicol3/reftest.list": [
    "a425424ad71bb67ef8559d032227f383dafb7115",
    "support"
   ],
   "css/vendor-imports/mozilla/mozilla-central-reftests/reftest.list": [
    "6d496e71f13949bd5b987ee090de61cb55ea410f",
@@ -569832,17 +569843,17 @@
    "5f29436964d01c57f61d513cee5b83281643ac54",
    "testharness"
   ],
   "cssom/escape.html": [
    "c9ed57c7ef7a035c25feff4ea60547a57d727f31",
    "testharness"
   ],
   "cssom/getComputedStyle-pseudo.html": [
-   "b9d037db577325526d2414270d2ceefcd6587a6d",
+   "1eead8a132a035788c5d5584b41024e42975bd9c",
    "testharness"
   ],
   "cssom/historical.html": [
    "2c78218b89efb9bdf60cf708920be142051347c7",
    "testharness"
   ],
   "cssom/index-001.html": [
    "ab9e9f102f5909d9b5587f2c0ea54c0c6b59868d",
@@ -604224,17 +604235,17 @@
    "049b5e9505165723cec70237e2ae5f0e2c7948f0",
    "testharness"
   ],
   "page-visibility/OWNERS": [
    "b82f9756b15ef3ea45fb250e304031d9ceaee9c7",
    "support"
   ],
   "page-visibility/idlharness.html": [
-   "6bbcc548a783a56340aa256e5f51ca51c1b3f4d3",
+   "d6d16a7aed48659afaf14acd5e21271a8ce8cec0",
    "testharness"
   ],
   "page-visibility/prerender_call.html": [
    "17f8962a145f6bd7047f236b5b4eb7f825769004",
    "testharness"
   ],
   "page-visibility/resources/blank_page_green.html": [
    "2d6d55d85e17a9fe978db6dbe25ae35a599d5683",
@@ -621651,16 +621662,24 @@
   "webdriver/tests/contexts.py": [
    "9c4be1b08b99945621b149d1aa2aa64167caad50",
    "wdspec"
   ],
   "webdriver/tests/cookies.py": [
    "e31177e638269864031e44808945fa1e7c46031c",
    "wdspec"
   ],
+  "webdriver/tests/element_click/__init__.py": [
+   "da39a3ee5e6b4b0d3255bfef95601890afd80709",
+   "support"
+  ],
+  "webdriver/tests/element_click/select.py": [
+   "5ba51b660c7203bba3ada597c2f56fe094358e1f",
+   "wdspec"
+  ],
   "webdriver/tests/navigation.py": [
    "cec2987258d9c807a247da9e0216b3af1f171484",
    "wdspec"
   ],
   "webdriver/tests/support/__init__.py": [
    "5a31a3917a5157516c10951a3b3d5ffb43b992d9",
    "support"
   ],

new file mode 100644

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/tests/webdriver/tests/element_click/select.py
@@ -0,0 +1,213 @@
+from tests.support.inline import inline
+
+
+def test_click_option(session):
+    session.url = inline("""
+      <select>
+        <option>first
+        <option>second
+      </select>""")
+    options = session.find.css("option")
+
+    assert options[0].selected
+    assert not options[1].selected
+
+    options[1].click()
+    assert options[1].selected
+    assert not options[0].selected
+
+
+def test_click_multiple_option(session):
+    session.url = inline("""
+      <select multiple>
+        <option>first
+        <option>second
+      </select>""")
+    options = session.find.css("option")
+
+    assert not options[0].selected
+    assert not options[1].selected
+
+    options[0].click()
+    assert options[0].selected
+    assert not options[1].selected
+
+
+def test_click_preselected_option(session):
+    session.url = inline("""
+      <select>
+        <option>first
+        <option selected>second
+      </select>""")
+    options = session.find.css("option")
+
+    assert not options[0].selected
+    assert options[1].selected
+
+    options[1].click()
+    assert options[1].selected
+    assert not options[0].selected
+
+    options[0].click()
+    assert options[0].selected
+    assert not options[1].selected
+
+
+def test_click_preselected_multiple_option(session):
+    session.url = inline("""
+      <select multiple>
+        <option>first
+        <option selected>second
+      </select>""")
+    options = session.find.css("option")
+
+    assert not options[0].selected
+    assert options[1].selected
+
+    options[1].click()
+    assert not options[1].selected
+    assert not options[0].selected
+
+    options[0].click()
+    assert options[0].selected
+    assert not options[1].selected
+
+
+def test_click_deselects_others(session):
+    session.url = inline("""
+      <select>
+        <option>first
+        <option>second
+        <option>third
+      </select>""")
+    options = session.find.css("option")
+
+    options[0].click()
+    assert options[0].selected
+    options[1].click()
+    assert options[1].selected
+    options[2].click()
+    assert options[2].selected
+    options[0].click()
+    assert options[0].selected
+
+
+def test_click_multiple_does_not_deselect_others(session):
+    session.url = inline("""
+      <select multiple>
+        <option>first
+        <option>second
+        <option>third
+      </select>""")
+    options = session.find.css("option")
+
+    options[0].click()
+    assert options[0].selected
+    options[1].click()
+    assert options[0].selected
+    assert options[1].selected
+    options[2].click()
+    assert options[0].selected
+    assert options[1].selected
+    assert options[2].selected
+
+
+def test_click_selected_option(session):
+    session.url = inline("""
+      <select>
+        <option>first
+        <option>second
+      </select>""")
+    options = session.find.css("option")
+
+    # First <option> is selected in dropdown
+    assert options[0].selected
+    assert not options[1].selected
+
+    options[1].click()
+    assert options[1].selected
+    options[1].click()
+    assert options[1].selected
+
+
+def test_click_selected_multiple_option(session):
+    session.url = inline("""
+      <select multiple>
+        <option>first
+        <option>second
+      </select>""")
+    options = session.find.css("option")
+
+    # No implicitly selected <option> in <select multiple>
+    assert not options[0].selected
+    assert not options[1].selected
+
+    options[0].click()
+    assert options[0].selected
+    assert not options[1].selected
+
+    # Second click in <select multiple> deselects
+    options[0].click()
+    assert not options[0].selected
+    assert not options[1].selected
+
+
+def test_out_of_view_dropdown(session):
+    session.url = inline("""
+      <select>
+        <option>1
+        <option>2
+        <option>3
+        <option>4
+        <option>5
+        <option>6
+        <option>7
+        <option>8
+        <option>9
+        <option>10
+        <option>11
+        <option>12
+        <option>13
+        <option>14
+        <option>15
+        <option>16
+        <option>17
+        <option>18
+        <option>19
+        <option>20
+      </select>""")
+    options = session.find.css("option")
+
+    options[14].click()
+    assert options[14].selected
+
+
+def test_out_of_view_multiple(session):
+    session.url = inline("""
+      <select multiple>
+        <option>1
+        <option>2
+        <option>3
+        <option>4
+        <option>5
+        <option>6
+        <option>7
+        <option>8
+        <option>9
+        <option>10
+        <option>11
+        <option>12
+        <option>13
+        <option>14
+        <option>15
+        <option>16
+        <option>17
+        <option>18
+        <option>19
+        <option>20
+      </select>""")
+    options = session.find.css("option")
+
+    last_option = options[-1]
+    last_option.click()
+    assert last_option.selected