diff --git a/tests/module/simple_gmap_stress_test/config/install/core.entity_form_display.node.simple_gmap_stress_test.default.yml b/tests/module/simple_gmap_stress_test/config/install/core.entity_form_display.node.simple_gmap_stress_test.default.yml
new file mode 100644
index 0000000..b1378ef
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/config/install/core.entity_form_display.node.simple_gmap_stress_test.default.yml
@@ -0,0 +1,91 @@
+uuid: acdfe773-c815-454d-b520-bbdf5a7ed473
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.field.node.simple_gmap_stress_test.field_map1
+    - field.field.node.simple_gmap_stress_test.field_map2
+    - field.field.node.simple_gmap_stress_test.field_xss
+    - node.type.simple_gmap_stress_test
+  module:
+    - path
+id: node.simple_gmap_stress_test.default
+targetEntityType: node
+bundle: simple_gmap_stress_test
+mode: default
+content:
+  created:
+    type: datetime_timestamp
+    weight: 10
+    region: content
+    settings: {  }
+    third_party_settings: {  }
+  field_map1:
+    weight: 121
+    settings:
+      size: 60
+      placeholder: ''
+    third_party_settings: {  }
+    type: string_textfield
+    region: content
+  field_map2:
+    weight: 122
+    settings:
+      size: 60
+      placeholder: ''
+    third_party_settings: {  }
+    type: string_textfield
+    region: content
+  field_xss:
+    weight: 123
+    settings:
+      size: 60
+      placeholder: ''
+    third_party_settings: {  }
+    type: string_textfield
+    region: content
+  path:
+    type: path
+    weight: 30
+    region: content
+    settings: {  }
+    third_party_settings: {  }
+  promote:
+    type: boolean_checkbox
+    settings:
+      display_label: true
+    weight: 15
+    region: content
+    third_party_settings: {  }
+  status:
+    type: boolean_checkbox
+    settings:
+      display_label: true
+    weight: 120
+    region: content
+    third_party_settings: {  }
+  sticky:
+    type: boolean_checkbox
+    settings:
+      display_label: true
+    weight: 16
+    region: content
+    third_party_settings: {  }
+  title:
+    type: string_textfield
+    weight: -5
+    region: content
+    settings:
+      size: 60
+      placeholder: ''
+    third_party_settings: {  }
+  uid:
+    type: entity_reference_autocomplete
+    weight: 5
+    settings:
+      match_operator: CONTAINS
+      size: 60
+      placeholder: ''
+    region: content
+    third_party_settings: {  }
+hidden: {  }
diff --git a/tests/module/simple_gmap_stress_test/config/install/core.entity_view_display.node.simple_gmap_stress_test.default.yml b/tests/module/simple_gmap_stress_test/config/install/core.entity_view_display.node.simple_gmap_stress_test.default.yml
new file mode 100644
index 0000000..f0a5525
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/config/install/core.entity_view_display.node.simple_gmap_stress_test.default.yml
@@ -0,0 +1,80 @@
+uuid: 56138ea6-7df8-445f-8fe9-44b86e65e71e
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.field.node.simple_gmap_stress_test.field_map1
+    - field.field.node.simple_gmap_stress_test.field_map2
+    - field.field.node.simple_gmap_stress_test.field_xss
+    - node.type.simple_gmap_stress_test
+  module:
+    - simple_gmap
+    - user
+id: node.simple_gmap_stress_test.default
+targetEntityType: node
+bundle: simple_gmap_stress_test
+mode: default
+content:
+  field_map1:
+    weight: 101
+    label: above
+    settings:
+      include_map: true
+      include_static_map: true
+      apikey: 'Static maps will not work unless you put in a key'
+      iframe_width: '200'
+      iframe_height: '200'
+      static_scale: 1
+      link_text: 'View larger map'
+      zoom_level: 14
+      map_type: m
+      langcode: en
+      include_link: false
+      include_text: false
+    third_party_settings: {  }
+    type: simple_gmap
+    region: content
+  field_map2:
+    weight: 102
+    label: above
+    settings:
+      include_map: true
+      include_static_map: true
+      apikey: 'Static maps will not work unless you put in a key'
+      iframe_width: '200'
+      iframe_height: '200'
+      static_scale: 1
+      link_text: 'View larger map'
+      zoom_level: 5
+      include_text: true
+      map_type: k
+      langcode: en
+      include_link: false
+    third_party_settings: {  }
+    type: simple_gmap
+    region: content
+  field_xss:
+    weight: 103
+    label: above
+    settings:
+      include_map: true
+      include_static_map: true
+      apikey: ''
+      iframe_width: '200'
+      iframe_height: '200'
+      static_scale: 1
+      include_link: true
+      link_text: 'View larger map'
+      zoom_level: 14
+      map_type: m
+      langcode: en
+      include_text: false
+    third_party_settings: {  }
+    type: simple_gmap
+    region: content
+  links:
+    weight: 100
+    region: content
+    settings: {  }
+    third_party_settings: {  }
+hidden: {  }
diff --git a/tests/module/simple_gmap_stress_test/config/install/core.entity_view_display.node.simple_gmap_stress_test.teaser.yml b/tests/module/simple_gmap_stress_test/config/install/core.entity_view_display.node.simple_gmap_stress_test.teaser.yml
new file mode 100644
index 0000000..5a4d183
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/config/install/core.entity_view_display.node.simple_gmap_stress_test.teaser.yml
@@ -0,0 +1,18 @@
+uuid: f5d4434b-9f05-402c-8a8a-a7eb0f10b4d8
+langcode: en
+status: true
+dependencies:
+  config:
+    - core.entity_view_mode.node.teaser
+    - node.type.simple_gmap_stress_test
+  module:
+    - user
+id: node.simple_gmap_stress_test.teaser
+targetEntityType: node
+bundle: simple_gmap_stress_test
+mode: teaser
+content:
+  links:
+    weight: 100
+    region: content
+hidden: {  }
diff --git a/tests/module/simple_gmap_stress_test/config/install/field.field.node.simple_gmap_stress_test.field_map1.yml b/tests/module/simple_gmap_stress_test/config/install/field.field.node.simple_gmap_stress_test.field_map1.yml
new file mode 100644
index 0000000..3fd28d6
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/config/install/field.field.node.simple_gmap_stress_test.field_map1.yml
@@ -0,0 +1,21 @@
+uuid: 74825356-64da-4f38-8ebd-3451e09cb2d3
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_map1
+    - node.type.simple_gmap_stress_test
+id: node.simple_gmap_stress_test.field_map1
+field_name: field_map1
+entity_type: node
+bundle: simple_gmap_stress_test
+label: map1
+description: 'Expect to see a location in Paris.'
+required: true
+translatable: false
+default_value:
+  -
+    value: 'Eiffel Tower'
+default_value_callback: ''
+settings: {  }
+field_type: string
diff --git a/tests/module/simple_gmap_stress_test/config/install/field.field.node.simple_gmap_stress_test.field_map2.yml b/tests/module/simple_gmap_stress_test/config/install/field.field.node.simple_gmap_stress_test.field_map2.yml
new file mode 100644
index 0000000..488bc59
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/config/install/field.field.node.simple_gmap_stress_test.field_map2.yml
@@ -0,0 +1,21 @@
+uuid: 9ec89da2-070b-4bdf-9c3d-72a603d89e5b
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_map2
+    - node.type.simple_gmap_stress_test
+id: node.simple_gmap_stress_test.field_map2
+field_name: field_map2
+entity_type: node
+bundle: simple_gmap_stress_test
+label: map2
+description: 'A view in Quebec. Demonstrates a complex character set.'
+required: true
+translatable: false
+default_value:
+  -
+    value: 'Place de l'Université-du-Québec, boulevard Charest Est, Québec, QC G1K'
+default_value_callback: ''
+settings: {  }
+field_type: string
diff --git a/tests/module/simple_gmap_stress_test/config/install/field.field.node.simple_gmap_stress_test.field_xss.yml b/tests/module/simple_gmap_stress_test/config/install/field.field.node.simple_gmap_stress_test.field_xss.yml
new file mode 100644
index 0000000..beb42c8
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/config/install/field.field.node.simple_gmap_stress_test.field_xss.yml
@@ -0,0 +1,21 @@
+uuid: e5a33bb0-5699-46c8-bad7-196d1fc0d7ef
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_xss
+    - node.type.simple_gmap_stress_test
+id: node.simple_gmap_stress_test.field_xss
+field_name: field_xss
+entity_type: node
+bundle: simple_gmap_stress_test
+label: xss
+description: 'This field demonstrates the rejection of a XSS attack.'
+required: true
+translatable: false
+default_value:
+  -
+    value: '<script>alert("hello");</script> Empire State Building'
+default_value_callback: ''
+settings: {  }
+field_type: string
diff --git a/tests/module/simple_gmap_stress_test/config/install/field.storage.node.field_map1.yml b/tests/module/simple_gmap_stress_test/config/install/field.storage.node.field_map1.yml
new file mode 100644
index 0000000..5b54d90
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/config/install/field.storage.node.field_map1.yml
@@ -0,0 +1,21 @@
+uuid: ed08abe4-2bfe-4d64-89da-d8794ff1535d
+langcode: en
+status: true
+dependencies:
+  module:
+    - node
+id: node.field_map1
+field_name: field_map1
+entity_type: node
+type: string
+settings:
+  max_length: 255
+  is_ascii: false
+  case_sensitive: false
+module: core
+locked: false
+cardinality: 1
+translatable: true
+indexes: {  }
+persist_with_no_fields: false
+custom_storage: false
diff --git a/tests/module/simple_gmap_stress_test/config/install/field.storage.node.field_map2.yml b/tests/module/simple_gmap_stress_test/config/install/field.storage.node.field_map2.yml
new file mode 100644
index 0000000..498d20f
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/config/install/field.storage.node.field_map2.yml
@@ -0,0 +1,21 @@
+uuid: 5bb62b53-fea7-4b4d-9057-67734296670b
+langcode: en
+status: true
+dependencies:
+  module:
+    - node
+id: node.field_map2
+field_name: field_map2
+entity_type: node
+type: string
+settings:
+  max_length: 255
+  is_ascii: false
+  case_sensitive: false
+module: core
+locked: false
+cardinality: 1
+translatable: true
+indexes: {  }
+persist_with_no_fields: false
+custom_storage: false
diff --git a/tests/module/simple_gmap_stress_test/config/install/field.storage.node.field_xss.yml b/tests/module/simple_gmap_stress_test/config/install/field.storage.node.field_xss.yml
new file mode 100644
index 0000000..84bce0c
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/config/install/field.storage.node.field_xss.yml
@@ -0,0 +1,21 @@
+uuid: 581bfa0f-d8f4-413b-8cd8-a2d048a67d35
+langcode: en
+status: true
+dependencies:
+  module:
+    - node
+id: node.field_xss
+field_name: field_xss
+entity_type: node
+type: string
+settings:
+  max_length: 255
+  is_ascii: false
+  case_sensitive: false
+module: core
+locked: false
+cardinality: 1
+translatable: true
+indexes: {  }
+persist_with_no_fields: false
+custom_storage: false
diff --git a/tests/module/simple_gmap_stress_test/config/install/node.type.simple_gmap_stress_test.yml b/tests/module/simple_gmap_stress_test/config/install/node.type.simple_gmap_stress_test.yml
new file mode 100644
index 0000000..caf2ce8
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/config/install/node.type.simple_gmap_stress_test.yml
@@ -0,0 +1,18 @@
+uuid: 39d6d049-a8c5-4f7a-b2da-92ad2661f2ee
+langcode: en
+status: true
+dependencies:
+  module:
+    - menu_ui
+third_party_settings:
+  menu_ui:
+    available_menus:
+      - main
+    parent: 'main:'
+name: 'simple gmap stress test'
+type: simple_gmap_stress_test
+description: 'A series of field configured to utilize the simple gmap formatter. Each field test a different aspect of the formatter.'
+help: ''
+new_revision: true
+preview_mode: 1
+display_submitted: true
diff --git a/tests/module/simple_gmap_stress_test/stress_test.info.yml b/tests/module/simple_gmap_stress_test/stress_test.info.yml
new file mode 100644
index 0000000..114db32
--- /dev/null
+++ b/tests/module/simple_gmap_stress_test/stress_test.info.yml
@@ -0,0 +1,7 @@
+name: simple_gmap_stress_test
+type: module
+description: 'Provides a stress_test content entity.'
+package: Custom
+core: 8.x
+dependencies:
+  - simple_gmap
diff --git a/tests/src/Functional/StressTest.php b/tests/src/Functional/StressTest.php
new file mode 100644
index 0000000..92235a8
--- /dev/null
+++ b/tests/src/Functional/StressTest.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace Drupal\Tests\simple_gmap\Functional;
+
+use Drupal\node\Entity\NodeType;
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * Tests the entity form checkbox output respects flag access control.
+ *
+ * @group flag
+ */
+class StressTest extends BrowserTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = [
+    'system',
+    'user',
+    'node',
+  ];
+
+  /**
+   * The simple_gmap stress content type.
+   *
+   * @var \Drupal\node\Entity\Node
+   */
+  protected $node;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    // Create and login as an authenticated user.
+    $auth_user = $this->drupalCreateUser([
+      'access content',
+      'edit any page content',
+    ]);
+    $this->drupalLogin($auth_user);
+
+    // Create a stress test node with three fields where the default values
+    // will exercise the formater.
+    $this->node = NodeType::create([
+      'type' => 'simple_gmap_stress_test',
+      'title' => 'A three field node',
+      ]);
+    $this->node->save();
+  }
+
+  /**
+   * Tests the access to the flag checkbox in the node edit form.
+   */
+  public function testCheckboxAccess() {
+    // Get the node edit form.
+    $this->drupalGet("node/" . $this->node->id());
+
+    $this->assertSession()->pageTextContains('XYZ', 'The field was as expected..');
+  }
+
+}