diff --git a/grade/grading/form/guide/classes/privacy/provider.php b/grade/grading/form/guide/classes/privacy/provider.php
index b7908c93e7a..98653475a6d 100644
--- a/grade/grading/form/guide/classes/privacy/provider.php
+++ b/grade/grading/form/guide/classes/privacy/provider.php
@@ -37,6 +37,7 @@ use \core_privacy\local\request\writer;
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class provider implements
+        \core_privacy\local\metadata\provider,
         \core_privacy\local\request\user_preference_provider {
 
     /**
diff --git a/portfolio/boxnet/classes/privacy/provider.php b/portfolio/boxnet/classes/privacy/provider.php
index 977114983e4..b8506b3029e 100644
--- a/portfolio/boxnet/classes/privacy/provider.php
+++ b/portfolio/boxnet/classes/privacy/provider.php
@@ -36,6 +36,7 @@ use core_privacy\local\metadata\collection;
 class provider implements
     // This portfolio plugin does not store any data itself.
     // It has no database tables, and it purely acts as a conduit, sending data externally.
+    \core_privacy\local\metadata\provider,
     \core_portfolio\privacy\portfolio_provider {
 
     /**
diff --git a/portfolio/flickr/classes/privacy/provider.php b/portfolio/flickr/classes/privacy/provider.php
index 8b272b9a4ca..c041bed8717 100644
--- a/portfolio/flickr/classes/privacy/provider.php
+++ b/portfolio/flickr/classes/privacy/provider.php
@@ -36,6 +36,7 @@ use core_privacy\local\metadata\collection;
 class provider implements
         // This portfolio plugin does not store any data itself.
         // It has no database tables, and it purely acts as a conduit, sending data externally.
+        \core_privacy\local\metadata\provider,
         \core_portfolio\privacy\portfolio_provider {
 
     /**
diff --git a/portfolio/googledocs/classes/privacy/provider.php b/portfolio/googledocs/classes/privacy/provider.php
index cd2505f0764..505340ae20a 100644
--- a/portfolio/googledocs/classes/privacy/provider.php
+++ b/portfolio/googledocs/classes/privacy/provider.php
@@ -36,6 +36,7 @@ use core_privacy\local\metadata\collection;
 class provider implements
         // This portfolio plugin does not store any data itself.
         // It has no database tables, and it purely acts as a conduit, sending data externally.
+        \core_privacy\local\metadata\provider,
         \core_portfolio\privacy\portfolio_provider {
 
     /**
diff --git a/portfolio/mahara/classes/privacy/provider.php b/portfolio/mahara/classes/privacy/provider.php
index d73e39ebc65..eb7b395460d 100644
--- a/portfolio/mahara/classes/privacy/provider.php
+++ b/portfolio/mahara/classes/privacy/provider.php
@@ -36,6 +36,7 @@ use core_privacy\local\metadata\collection;
 class provider implements
         // This portfolio plugin does not store any data itself.
         // It has no database tables, and it purely acts as a conduit, sending data externally.
+        \core_privacy\local\metadata\provider,
         \core_portfolio\privacy\portfolio_provider {
 
     /**
diff --git a/portfolio/picasa/classes/privacy/provider.php b/portfolio/picasa/classes/privacy/provider.php
index 00d0828ed1e..317cf262eec 100644
--- a/portfolio/picasa/classes/privacy/provider.php
+++ b/portfolio/picasa/classes/privacy/provider.php
@@ -36,6 +36,7 @@ use core_privacy\local\metadata\collection;
 class provider implements
         // This portfolio plugin does not store any data itself.
         // It has no database tables, and it purely acts as a conduit, sending data externally.
+        \core_privacy\local\metadata\provider,
         \core_portfolio\privacy\portfolio_provider {
 
     /**
diff --git a/privacy/tests/provider_test.php b/privacy/tests/provider_test.php
index 943d54e7643..496d99678b4 100644
--- a/privacy/tests/provider_test.php
+++ b/privacy/tests/provider_test.php
@@ -163,6 +163,18 @@ class provider_testcase extends advanced_testcase {
         }
     }
 
+    /**
+     * Test that all providers implement some form of compliant provider.
+     *
+     * @dataProvider get_component_list
+     * @param string $component frankenstyle component name, e.g. 'mod_assign'
+     * @param string $classname the fully qualified provider classname
+     */
+    public function test_all_providers_compliant($component, $classname) {
+        $manager = new manager();
+        $this->assertTrue($manager->component_is_compliant($component));
+    }
+
     /**
      * Data provider for the metadata\provider tests.
      *