diff --git a/studio/frontend/src/index.css b/studio/frontend/src/index.css
index cf7bee70d5..a14643fefd 100644
--- a/studio/frontend/src/index.css
+++ b/studio/frontend/src/index.css
@@ -1684,6 +1684,11 @@
 		padding: 0 !important;
 	}
 
+	.aui-thread-root [data-streamdown="code-block-body"] {
+		/* Keep overlay scrollbars below one-line code. */
+		padding-bottom: 0.625rem !important;
+	}
+
 	[data-streamdown="code-block"] {
 		gap: 0.25rem;
 		padding: 0.75rem 1rem;