diff --git a/config/schema/better_formats.schema.yml b/config/schema/better_formats.schema.yml
index a767614..96f0a98 100644
--- a/config/schema/better_formats.schema.yml
+++ b/config/schema/better_formats.schema.yml
@@ -4,3 +4,36 @@ better_formats.settings:
     per_field_core:
       type: boolean
       label: 'Use field default'
+
+# Schema for field config Better Formats third party settings.
+field.field.*.*.*.third_party.better_formats:
+  type: mapping
+  label: 'Better formats field settings'
+  mapping:
+    allowed_formats_toggle:
+      type: boolean
+      label: 'Restrict to allowed formats'
+    allowed_formats:
+      type: sequence
+      label: 'Allowed formats'
+      sequence:
+        # Ignoring: The value can be either string or integer.
+        type: ignore
+        label: Format
+    default_order_toggle:
+      type: boolean
+      label: 'Reorder formats'
+    default_order_wrapper:
+      type: mapping
+      label: 'Default Order'
+      mapping:
+        formats:
+          type: sequence
+          label: 'List of ordered formats'
+          sequence:
+            type: mapping
+            label: 'Format entry'
+            mapping:
+              weight:
+                type: string
+                label: Weight
diff --git a/tests/modules/better_formats_test/better_formats_test.info.yml b/tests/modules/better_formats_test/better_formats_test.info.yml
new file mode 100644
index 0000000..4b882d3
--- /dev/null
+++ b/tests/modules/better_formats_test/better_formats_test.info.yml
@@ -0,0 +1,9 @@
+type: module
+core: '8.x'
+name: 'Better Formats Test'
+description: 'Testing module used by Better Formats tests.'
+package: Testing
+version: VERSION
+dependencies:
+  - better_formats
+  - node
diff --git a/tests/modules/better_formats_test/config/install/core.entity_form_display.node.page.default.yml b/tests/modules/better_formats_test/config/install/core.entity_form_display.node.page.default.yml
new file mode 100644
index 0000000..62fe7bd
--- /dev/null
+++ b/tests/modules/better_formats_test/config/install/core.entity_form_display.node.page.default.yml
@@ -0,0 +1,36 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.field.node.page.body
+    - node.type.page
+  module:
+    - text
+id: node.page.default
+targetEntityType: node
+bundle: page
+mode: default
+content:
+  title:
+    type: string_textfield
+    weight: -5
+    region: content
+    settings:
+      size: 60
+      placeholder: ''
+    third_party_settings: {  }
+  body:
+    type: text_textarea_with_summary
+    weight: 31
+    region: content
+    settings:
+      rows: 9
+      summary_rows: 3
+      placeholder: ''
+    third_party_settings: {  }
+hidden:
+  created: true
+  path: true
+  promote: true
+  sticky: true
+  uid: true
diff --git a/tests/modules/better_formats_test/config/install/field.field.node.page.body.yml b/tests/modules/better_formats_test/config/install/field.field.node.page.body.yml
new file mode 100644
index 0000000..0aefb8c
--- /dev/null
+++ b/tests/modules/better_formats_test/config/install/field.field.node.page.body.yml
@@ -0,0 +1,38 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.body
+    - node.type.page
+  module:
+    - better_formats
+    - text
+third_party_settings:
+  better_formats:
+    allowed_formats_toggle: true
+    allowed_formats:
+      format1: format1
+      format2: format2
+      plain_text: 0
+    default_order_toggle: false
+    default_order_wrapper:
+      formats:
+        format1:
+          weight: '-10'
+        format2:
+          weight: '0'
+        plain_text:
+          weight: '0'
+id: node.page.body
+field_name: body
+entity_type: node
+bundle: page
+label: Body
+description: ''
+required: false
+translatable: true
+default_value: {  }
+default_value_callback: ''
+settings:
+  display_summary: true
+field_type: text_with_summary
diff --git a/tests/modules/better_formats_test/config/install/filter.format.format1.yml b/tests/modules/better_formats_test/config/install/filter.format.format1.yml
new file mode 100644
index 0000000..f6fbd46
--- /dev/null
+++ b/tests/modules/better_formats_test/config/install/filter.format.format1.yml
@@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+name: 'Format 1'
+format: format1
+weight: 0
+filters: {  }
diff --git a/tests/modules/better_formats_test/config/install/filter.format.format2.yml b/tests/modules/better_formats_test/config/install/filter.format.format2.yml
new file mode 100644
index 0000000..3b4fc13
--- /dev/null
+++ b/tests/modules/better_formats_test/config/install/filter.format.format2.yml
@@ -0,0 +1,7 @@
+langcode: en
+status: true
+dependencies: {  }
+name: 'Format 2'
+format: format2
+weight: 1
+filters: {  }
diff --git a/tests/modules/better_formats_test/config/install/node.type.page.yml b/tests/modules/better_formats_test/config/install/node.type.page.yml
new file mode 100644
index 0000000..5ed26f8
--- /dev/null
+++ b/tests/modules/better_formats_test/config/install/node.type.page.yml
@@ -0,0 +1,10 @@
+langcode: en
+status: true
+dependencies: {  }
+name: Page
+type: page
+description: 'Used for testing.'
+help: ''
+new_revision: true
+preview_mode: 1
+display_submitted: false
diff --git a/tests/src/Kernel/BetterFormatsConfigSchemaTest.php b/tests/src/Kernel/BetterFormatsConfigSchemaTest.php
new file mode 100644
index 0000000..b723790
--- /dev/null
+++ b/tests/src/Kernel/BetterFormatsConfigSchemaTest.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace Drupal\Tests\better_formats\Kernel;
+
+use Drupal\field\Entity\FieldConfig;
+use Drupal\KernelTests\KernelTestBase;
+
+/**
+ * Tests the field config 3rd party settings provided by Better Formats.
+ *
+ * @group better_formats
+ */
+class BetterFormatsConfigSchemaTest extends KernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'better_formats',
+    'better_formats_test',
+    'field',
+    'filter',
+    'node',
+    'system',
+    'text',
+    'user',
+  ];
+
+  /**
+   * Tests the field config 3rd party settings provided by Better Formats.
+   */
+  public function testConfigSchema() {
+    // Check that schema is valid by installing the configuration provided by
+    // the 'better_formats_test' module which contains a node body field with
+    // Better Formats third party settings.
+    $this->installConfig(['node', 'better_formats_test']);
+    $this->assertTrue(FieldConfig::load('node.page.body'));
+  }
+
+}