.../tests/src/Functional/EntityResource/EntityResourceTestBase.php   | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
index 2f7864c..257c580 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/EntityResourceTestBase.php
@@ -161,7 +161,10 @@
    *   Provisions a single-format entity REST resource. Defaults to FALSE.
    */
   protected function provisionEntityResource($single_format = FALSE) {
-    $this->resourceConfigStorage->delete($this->resourceConfigStorage->loadMultiple());
+    if ($existing = $this->resourceConfigStorage->load(static::$resourceConfigId)) {
+      $existing->delete();
+    }
+
     $format = $single_format
       ? [static::$format]
       : [static::$format, 'foobar'];