diff --git a/src/plugins/data/public/ui/dataset_selector/_dataset_selector.scss b/src/plugins/data/public/ui/dataset_selector/_dataset_selector.scss
index 179bb8cf7917..9ec6ca531cf8 100644
--- a/src/plugins/data/public/ui/dataset_selector/_dataset_selector.scss
+++ b/src/plugins/data/public/ui/dataset_selector/_dataset_selector.scss
@@ -3,6 +3,10 @@
     margin-right: 4px;
   }
 
+  &__advancedButton {
+    width: 100%;
+  }
+
   &__selectable {
     width: 365px;
     padding: $euiSizeXS;
diff --git a/src/plugins/data/public/ui/dataset_selector/dataset_explorer.tsx b/src/plugins/data/public/ui/dataset_selector/dataset_explorer.tsx
index b17a38ae8295..c8c6adcb4866 100644
--- a/src/plugins/data/public/ui/dataset_selector/dataset_explorer.tsx
+++ b/src/plugins/data/public/ui/dataset_selector/dataset_explorer.tsx
@@ -133,7 +133,7 @@ export const DatasetExplorer = ({
                     },
                     searchable: true,
                   })}
-                  className="datasetSelector__selectable"
+                  className="datasetExplorer__selectable"
                 >
                   {(list, search) => (
                     <>