diff --git a/resources/servo.css b/resources/servo.css
index d5aa93e3e51..bcdab2bb568 100644
--- a/resources/servo.css
+++ b/resources/servo.css
@@ -1,3 +1,4 @@
+button,
 input                   { background: white; min-height: 1.0em; padding: 0em; padding-left: 0.25em; padding-right: 0.25em; border: solid lightgrey 1px; color: black; font-family: sans-serif; font-size: 0.7em; white-space: nowrap; text-align: left; line-height: 1.8; }
 textarea                { background: white; min-height: 1.0em; padding: 0em; padding-left: 0.25em; padding-right: 0.25em; border: solid lightgrey 1px; color: black; font-family: sans-serif; font-size: 0.7em; white-space: pre; }
 input::selection,
diff --git a/tests/wpt/mozilla/tests/css/submit_focus_a.html b/tests/wpt/mozilla/tests/css/submit_focus_a.html
index e351bd22fa7..2f45fb0ac1b 100644
--- a/tests/wpt/mozilla/tests/css/submit_focus_a.html
+++ b/tests/wpt/mozilla/tests/css/submit_focus_a.html
@@ -1,9 +1,4 @@
 <link rel='match' href='submit_focus_b.html'>
-<style>
-button {
-    display: inline-block;
-}
-</style>
 <button id="1">Submit</button>
 <script>
 var elem = document.getElementById('1');
diff --git a/tests/wpt/mozilla/tests/css/submit_focus_b.html b/tests/wpt/mozilla/tests/css/submit_focus_b.html
index 1cedc3523a7..732c705b400 100644
--- a/tests/wpt/mozilla/tests/css/submit_focus_b.html
+++ b/tests/wpt/mozilla/tests/css/submit_focus_b.html
@@ -1,9 +1,3 @@
-<style>
-input {
-    padding-left: 0;
-    padding-right: 0;
-}
-</style>
 <input id="1" type="submit"></input>
 <script>
 var elem = document.getElementById('1');