diff --git a/packages/e2e-tests/specs/editor/plugins/__snapshots__/iframed-masonry-block.test.js.snap b/packages/e2e-tests/specs/editor/plugins/__snapshots__/iframed-masonry-block.test.js.snap
index a37b33cdc3f410..9410eb22c3697a 100644
--- a/packages/e2e-tests/specs/editor/plugins/__snapshots__/iframed-masonry-block.test.js.snap
+++ b/packages/e2e-tests/specs/editor/plugins/__snapshots__/iframed-masonry-block.test.js.snap
@@ -1,7 +1,9 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`iframed masonry block should load script and dependencies in iframe 1`] = `
-"<!-- wp:test/iframed-masonry-block -->
-<div class="wp-block-test-iframed-masonry-block"><div class="grid-item"></div><div class="grid-item grid-item--width2 grid-item--height2"></div><div class="grid-item grid-item--height3"></div><div class="grid-item grid-item--height2"></div><div class="grid-item grid-item--width3"></div><div class="grid-item"></div><div class="grid-item"></div><div class="grid-item grid-item--height2"></div><div class="grid-item grid-item--width2 grid-item--height3"></div><div class="grid-item"></div><div class="grid-item grid-item--height2"></div><div class="grid-item"></div><div class="grid-item grid-item--width2 grid-item--height2"></div><div class="grid-item grid-item--width2"></div><div class="grid-item"></div><div class="grid-item grid-item--height2"></div><div class="grid-item"></div><div class="grid-item"></div><div class="grid-item grid-item--height3"></div><div class="grid-item grid-item--height2"></div><div class="grid-item"></div><div class="grid-item"></div><div class="grid-item grid-item--height2"></div></div>
-<!-- /wp:test/iframed-masonry-block -->"
+"<!-- wp:quote {"className":"is-style-large"} -->
+<blockquote class="wp-block-quote is-style-large"><!-- wp:paragraph -->
+<p></p>
+<!-- /wp:paragraph --></blockquote>
+<!-- /wp:quote -->"
 `;
diff --git a/packages/e2e-tests/specs/editor/plugins/__snapshots__/plugins-api.test.js.snap b/packages/e2e-tests/specs/editor/plugins/__snapshots__/plugins-api.test.js.snap
index 4cac5cd6893cda..9e4a5ac3ad6f61 100644
--- a/packages/e2e-tests/specs/editor/plugins/__snapshots__/plugins-api.test.js.snap
+++ b/packages/e2e-tests/specs/editor/plugins/__snapshots__/plugins-api.test.js.snap
@@ -2,6 +2,6 @@
 
 exports[`Using Plugins API Document Setting Custom Panel Should render a custom panel inside Document Setting sidebar 1`] = `"My Custom Panel"`;
 
-exports[`Using Plugins API Sidebar Medium screen Should open plugins sidebar using More Menu item and render content 1`] = `"<div class="components-panel__header interface-complementary-area-header__small"><span class="interface-complementary-area-header__small-title">(no title)</span><button type="button" class="components-button has-icon" aria-label="Close plugin"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M12 13.06l3.712 3.713 1.061-1.06L13.061 12l3.712-3.712-1.06-1.06L12 10.938 8.288 7.227l-1.061 1.06L10.939 12l-3.712 3.712 1.06 1.061L12 13.061z"></path></svg></button></div><div class="components-panel__header interface-complementary-area-header" tabindex="-1"><strong>Plugin title</strong><button type="button" aria-pressed="true" aria-expanded="true" class="components-button interface-complementary-area__pin-unpin-item is-pressed has-icon" aria-label="Unpin from toolbar"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M11.776 4.454a.25.25 0 01.448 0l2.069 4.192a.25.25 0 00.188.137l4.626.672a.25.25 0 01.139.426l-3.348 3.263a.25.25 0 00-.072.222l.79 4.607a.25.25 0 01-.362.263l-4.138-2.175a.25.25 0 00-.232 0l-4.138 2.175a.25.25 0 01-.363-.263l.79-4.607a.25.25 0 00-.071-.222L4.754 9.881a.25.25 0 01.139-.426l4.626-.672a.25.25 0 00.188-.137l2.069-4.192z"></path></svg></button><button type="button" class="components-button has-icon" aria-label="Close plugin"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M12 13.06l3.712 3.713 1.061-1.06L13.061 12l3.712-3.712-1.06-1.06L12 10.938 8.288 7.227l-1.061 1.06L10.939 12l-3.712 3.712 1.06 1.061L12 13.061z"></path></svg></button></div><div class="components-panel"><div class="components-panel__body sidebar-title-plugin-panel is-opened"><div class="components-panel__row"><label for="title-plain-text">Title:</label><textarea class="block-editor-plain-text" id="title-plain-text" placeholder="(no title)" rows="1" style="overflow: hidden; overflow-wrap: break-word; resize: none; height: 18px;"></textarea></div><div class="components-panel__row"><button type="button" class="components-button is-primary">Reset</button></div></div></div>"`;
+exports[`Using Plugins API Sidebar Medium screen Should open plugins sidebar using More Menu item and render content 1`] = `"<div class="components-panel__header interface-complementary-area-header__small"><span class="interface-complementary-area-header__small-title">(no title)</span><button type="button" aria-controls="my-sidebar-plugin:title-sidebar" class="components-button has-icon" aria-label="Close plugin"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M12 13.06l3.712 3.713 1.061-1.06L13.061 12l3.712-3.712-1.06-1.06L12 10.938 8.288 7.227l-1.061 1.06L10.939 12l-3.712 3.712 1.06 1.061L12 13.061z"></path></svg></button></div><div class="components-panel__header interface-complementary-area-header" tabindex="-1"><strong>Plugin title</strong><button type="button" aria-pressed="true" aria-expanded="true" class="components-button interface-complementary-area__pin-unpin-item is-pressed has-icon" aria-label="Unpin from toolbar"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M11.776 4.454a.25.25 0 01.448 0l2.069 4.192a.25.25 0 00.188.137l4.626.672a.25.25 0 01.139.426l-3.348 3.263a.25.25 0 00-.072.222l.79 4.607a.25.25 0 01-.362.263l-4.138-2.175a.25.25 0 00-.232 0l-4.138 2.175a.25.25 0 01-.363-.263l.79-4.607a.25.25 0 00-.071-.222L4.754 9.881a.25.25 0 01.139-.426l4.626-.672a.25.25 0 00.188-.137l2.069-4.192z"></path></svg></button><button type="button" aria-controls="my-sidebar-plugin:title-sidebar" class="components-button has-icon" aria-label="Close plugin"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M12 13.06l3.712 3.713 1.061-1.06L13.061 12l3.712-3.712-1.06-1.06L12 10.938 8.288 7.227l-1.061 1.06L10.939 12l-3.712 3.712 1.06 1.061L12 13.061z"></path></svg></button></div><div class="components-panel"><div class="components-panel__body sidebar-title-plugin-panel is-opened"><div class="components-panel__row"><label for="title-plain-text">Title:</label><textarea class="block-editor-plain-text" id="title-plain-text" placeholder="(no title)" rows="1" style="overflow: hidden; overflow-wrap: break-word; resize: none; height: 18px;"></textarea></div><div class="components-panel__row"><button type="button" class="components-button is-primary">Reset</button></div></div></div>"`;
 
-exports[`Using Plugins API Sidebar Should open plugins sidebar using More Menu item and render content 1`] = `"<div class="components-panel__header interface-complementary-area-header__small"><span class="interface-complementary-area-header__small-title">(no title)</span><button type="button" class="components-button has-icon" aria-label="Close plugin"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M12 13.06l3.712 3.713 1.061-1.06L13.061 12l3.712-3.712-1.06-1.06L12 10.938 8.288 7.227l-1.061 1.06L10.939 12l-3.712 3.712 1.06 1.061L12 13.061z"></path></svg></button></div><div class="components-panel__header interface-complementary-area-header" tabindex="-1"><strong>Plugin title</strong><button type="button" aria-pressed="true" aria-expanded="true" class="components-button interface-complementary-area__pin-unpin-item is-pressed has-icon" aria-label="Unpin from toolbar"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M11.776 4.454a.25.25 0 01.448 0l2.069 4.192a.25.25 0 00.188.137l4.626.672a.25.25 0 01.139.426l-3.348 3.263a.25.25 0 00-.072.222l.79 4.607a.25.25 0 01-.362.263l-4.138-2.175a.25.25 0 00-.232 0l-4.138 2.175a.25.25 0 01-.363-.263l.79-4.607a.25.25 0 00-.071-.222L4.754 9.881a.25.25 0 01.139-.426l4.626-.672a.25.25 0 00.188-.137l2.069-4.192z"></path></svg></button><button type="button" class="components-button has-icon" aria-label="Close plugin"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M12 13.06l3.712 3.713 1.061-1.06L13.061 12l3.712-3.712-1.06-1.06L12 10.938 8.288 7.227l-1.061 1.06L10.939 12l-3.712 3.712 1.06 1.061L12 13.061z"></path></svg></button></div><div class="components-panel"><div class="components-panel__body sidebar-title-plugin-panel is-opened"><div class="components-panel__row"><label for="title-plain-text">Title:</label><textarea class="block-editor-plain-text" id="title-plain-text" placeholder="(no title)" rows="1" style="overflow: hidden; overflow-wrap: break-word; resize: none; height: 18px;"></textarea></div><div class="components-panel__row"><button type="button" class="components-button is-primary">Reset</button></div></div></div>"`;
+exports[`Using Plugins API Sidebar Should open plugins sidebar using More Menu item and render content 1`] = `"<div class="components-panel__header interface-complementary-area-header__small"><span class="interface-complementary-area-header__small-title">(no title)</span><button type="button" aria-controls="my-sidebar-plugin:title-sidebar" class="components-button has-icon" aria-label="Close plugin"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M12 13.06l3.712 3.713 1.061-1.06L13.061 12l3.712-3.712-1.06-1.06L12 10.938 8.288 7.227l-1.061 1.06L10.939 12l-3.712 3.712 1.06 1.061L12 13.061z"></path></svg></button></div><div class="components-panel__header interface-complementary-area-header" tabindex="-1"><strong>Plugin title</strong><button type="button" aria-pressed="true" aria-expanded="true" class="components-button interface-complementary-area__pin-unpin-item is-pressed has-icon" aria-label="Unpin from toolbar"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M11.776 4.454a.25.25 0 01.448 0l2.069 4.192a.25.25 0 00.188.137l4.626.672a.25.25 0 01.139.426l-3.348 3.263a.25.25 0 00-.072.222l.79 4.607a.25.25 0 01-.362.263l-4.138-2.175a.25.25 0 00-.232 0l-4.138 2.175a.25.25 0 01-.363-.263l.79-4.607a.25.25 0 00-.071-.222L4.754 9.881a.25.25 0 01.139-.426l4.626-.672a.25.25 0 00.188-.137l2.069-4.192z"></path></svg></button><button type="button" aria-controls="my-sidebar-plugin:title-sidebar" class="components-button has-icon" aria-label="Close plugin"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="M12 13.06l3.712 3.713 1.061-1.06L13.061 12l3.712-3.712-1.06-1.06L12 10.938 8.288 7.227l-1.061 1.06L10.939 12l-3.712 3.712 1.06 1.061L12 13.061z"></path></svg></button></div><div class="components-panel"><div class="components-panel__body sidebar-title-plugin-panel is-opened"><div class="components-panel__row"><label for="title-plain-text">Title:</label><textarea class="block-editor-plain-text" id="title-plain-text" placeholder="(no title)" rows="1" style="overflow: hidden; overflow-wrap: break-word; resize: none; height: 18px;"></textarea></div><div class="components-panel__row"><button type="button" class="components-button is-primary">Reset</button></div></div></div>"`;