diff --git a/wp-admin/edit-form-blocks.php b/wp-admin/edit-form-blocks.php
index 2ee0ba988a..0f4ccee94b 100644
--- a/wp-admin/edit-form-blocks.php
+++ b/wp-admin/edit-form-blocks.php
@@ -305,6 +305,7 @@ wp_enqueue_media(
 		'post' => $post->ID,
 	)
 );
+wp_tinymce_inline_scripts();
 wp_enqueue_editor();
 
 /**
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 6a3cf7d5e5..245d12d687 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -475,8 +475,18 @@ function wp_default_packages_inline_scripts( &$scripts ) {
 		'window.wp.oldEditor = window.wp.editor;',
 		'after'
 	);
+}
+
+/**
+ * Adds inline scripts required for the TinyMCE in the block editor.
+ *
+ * @since 5.0.0
+ *
+ * @global WP_Scripts $wp_scripts
+ */
+function wp_tinymce_inline_scripts() {
+	global $wp_scripts;
 
-	// TinyMCE init.
 	$tinymce_plugins = array(
 		'charmap',
 		'colorpicker',
@@ -587,7 +597,7 @@ function wp_default_packages_inline_scripts( &$scripts ) {
 		}
 	}';
 
-	$scripts->add_inline_script( 'wp-block-library', $script, 'before' );
+	$wp_scripts->add_inline_script( 'wp-block-library', $script, 'before' );
 }
 
 /**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index eaa01a9448..32ffc3ad5b 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.1-alpha-44250';
+$wp_version = '5.1-alpha-44251';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.