diff --git a/src/Plugin/migrate_plus/data_parser/SimpleXml.php b/src/Plugin/migrate_plus/data_parser/SimpleXml.php
index a526ecc2346155495472105b221df31769427629..2e51c9a0f3e34cb9013d251527ea692835ee50b4 100644
--- a/src/Plugin/migrate_plus/data_parser/SimpleXml.php
+++ b/src/Plugin/migrate_plus/data_parser/SimpleXml.php
@@ -38,6 +38,12 @@ class SimpleXml extends DataParserPluginBase {
    * {@inheritdoc}
    */
   protected function openSourceUrl($url) {
+    // Clear XML error buffer. Other Drupal code that executed during the
+    // migration may have polluted the error buffer and could create false
+    // positives in our error check below. We are only concerned with errors
+    // that occur from attempting to load the XML string into an object here.
+    libxml_clear_errors();
+
     $xml_data = $this->getDataFetcherPlugin()->getResponseContent($url);
     $xml = simplexml_load_string($xml_data);
     $this->registerNamespaces($xml);
diff --git a/src/Plugin/migrate_plus/data_parser/Xml.php b/src/Plugin/migrate_plus/data_parser/Xml.php
index 0213a0f7bb4df3454ff0d88de44168569a883ae6..6c08069276e886dd3907c0cc22ec3a2e18f2b78b 100644
--- a/src/Plugin/migrate_plus/data_parser/Xml.php
+++ b/src/Plugin/migrate_plus/data_parser/Xml.php
@@ -174,6 +174,13 @@ class Xml extends DataParserPluginBase {
   protected function openSourceUrl($url) {
     // (Re)open the provided URL.
     $this->reader->close();
+
+    // Clear XML error buffer. Other Drupal code that executed during the
+    // migration may have polluted the error buffer and could create false
+    // positives in our error check below. We are only concerned with errors
+    // that occur from attempting to load the XML string into an object here.
+    libxml_clear_errors();
+
     return $this->reader->open($url, NULL, \LIBXML_NOWARNING);
   }