diff --git a/ghost/admin/app/styles/layouts/post-preview.css b/ghost/admin/app/styles/layouts/post-preview.css
index c029e25596..c66eabcecc 100644
--- a/ghost/admin/app/styles/layouts/post-preview.css
+++ b/ghost/admin/app/styles/layouts/post-preview.css
@@ -249,6 +249,11 @@
     width: 740px;
 }
 
+.gh-post-preview-email-test .gh-btn-group .gh-btn span {
+    height: 34px;
+    line-height: 34px;
+}
+
 .gh-post-preview-email-input {
     width: 100%;
 }