diff --git a/Task/Collect/MethodCollector.php b/Task/Collect/MethodCollector.php
index f91a9620..1603bf4a 100644
--- a/Task/Collect/MethodCollector.php
+++ b/Task/Collect/MethodCollector.php
@@ -26,6 +26,10 @@ class MethodCollector {
    *  - 'description': The description from the method's docblock first line.
    */
   public function collectMethods($name) {
+    if (!$name) {
+      return [];
+    }
+
     // Get a reflection class for the interface.
     $reflection = new \ReflectionClass($name);
     $methods = $reflection->getMethods();
diff --git a/Task/Collect/PluginTypesCollector.php b/Task/Collect/PluginTypesCollector.php
index 36d7d9ff..8bfe10ae 100644
--- a/Task/Collect/PluginTypesCollector.php
+++ b/Task/Collect/PluginTypesCollector.php
@@ -614,7 +614,7 @@ protected function addPluginBaseClass(&$data) {
    */
   protected function analysePluginTypeBaseClassFromDefiningModule($data) {
     // Bail if the interface doesn't have an 'Interface' suffix.
-    if (!preg_match('@Interface$@', $data['plugin_interface'])) {
+      if (!$data['plugin_interface'] || !preg_match('@Interface$@', $data['plugin_interface'])) {
       return;
     }