diff --git a/src/wp-admin/css/common.css b/src/wp-admin/css/common.css
index eb7e02ca0c..ca61c32452 100644
--- a/src/wp-admin/css/common.css
+++ b/src/wp-admin/css/common.css
@@ -2817,6 +2817,11 @@ div.action-links {
 	font-size: 13px;
 }
 
+/* For non-js plugin installation screen ticket #36430. */
+.update-php .button.button-primary {
+	margin-right: 1em;
+}
+
 @media screen and ( max-width: 771px ) {
 	#plugin-information-title.with-banner {
 		height: 100px;
diff --git a/src/wp-admin/includes/class-plugin-installer-skin.php b/src/wp-admin/includes/class-plugin-installer-skin.php
index 34b202035e..6c55455239 100644
--- a/src/wp-admin/includes/class-plugin-installer-skin.php
+++ b/src/wp-admin/includes/class-plugin-installer-skin.php
@@ -52,12 +52,12 @@ class Plugin_Installer_Skin extends WP_Upgrader_Skin {
 		$from = isset($_GET['from']) ? wp_unslash( $_GET['from'] ) : 'plugins';
 
 		if ( 'import' == $from )
-			$install_actions['activate_plugin'] = '<a href="' . wp_nonce_url( 'plugins.php?action=activate&amp;from=import&amp;plugin=' . urlencode( $plugin_file ), 'activate-plugin_' . $plugin_file ) . '" target="_parent">' . __( 'Activate Plugin &amp; Run Importer' ) . '</a>';
+			$install_actions['activate_plugin'] = '<a class="button button-primary" href="' . wp_nonce_url( 'plugins.php?action=activate&amp;from=import&amp;plugin=' . urlencode( $plugin_file ), 'activate-plugin_' . $plugin_file ) . '" target="_parent">' . __( 'Activate Plugin &amp; Run Importer' ) . '</a>';
 		else
-			$install_actions['activate_plugin'] = '<a href="' . wp_nonce_url( 'plugins.php?action=activate&amp;plugin=' . urlencode( $plugin_file ), 'activate-plugin_' . $plugin_file ) . '" target="_parent">' . __( 'Activate Plugin' ) . '</a>';
+			$install_actions['activate_plugin'] = '<a class="button button-primary" href="' . wp_nonce_url( 'plugins.php?action=activate&amp;plugin=' . urlencode( $plugin_file ), 'activate-plugin_' . $plugin_file ) . '" target="_parent">' . __( 'Activate Plugin' ) . '</a>';
 
 		if ( is_multisite() && current_user_can( 'manage_network_plugins' ) ) {
-			$install_actions['network_activate'] = '<a href="' . wp_nonce_url( 'plugins.php?action=activate&amp;networkwide=1&amp;plugin=' . urlencode( $plugin_file ), 'activate-plugin_' . $plugin_file ) . '" target="_parent">' . __( 'Network Activate' ) . '</a>';
+			$install_actions['network_activate'] = '<a class="button button-primary" href="' . wp_nonce_url( 'plugins.php?action=activate&amp;networkwide=1&amp;plugin=' . urlencode( $plugin_file ), 'activate-plugin_' . $plugin_file ) . '" target="_parent">' . __( 'Network Activate' ) . '</a>';
 			unset( $install_actions['activate_plugin'] );
 		}
 
@@ -90,7 +90,8 @@ class Plugin_Installer_Skin extends WP_Upgrader_Skin {
 		 */
 		$install_actions = apply_filters( 'install_plugin_complete_actions', $install_actions, $this->api, $plugin_file );
 
-		if ( ! empty($install_actions) )
-			$this->feedback(implode(' | ', (array)$install_actions));
+		if ( ! empty( $install_actions ) ) {
+			$this->feedback( implode( ' ', (array) $install_actions ) );
+		}
 	}
 }