diff --git a/packages/block-library/src/cover/style.scss b/packages/block-library/src/cover/style.scss
index 472aeca030541..5f9f4ef98ebd2 100644
--- a/packages/block-library/src/cover/style.scss
+++ b/packages/block-library/src/cover/style.scss
@@ -253,3 +253,10 @@ section.wp-block-cover-image > h2,
 	padding: 0.44em;
 	text-align: center;
 }
+
+// The following sets baseline border styles with zero specificity such that
+// when a user begins to alter cover block borders via the block support UI they
+// see immediately visual changes.
+html :where(.wp-block-cover) {
+	border: 0 solid currentColor;
+}