diff --git a/src/api/endpoints/class-tainacan-rest-filters-controller.php b/src/api/endpoints/class-tainacan-rest-filters-controller.php
index adbe4a39b..ccabd6a5f 100644
--- a/src/api/endpoints/class-tainacan-rest-filters-controller.php
+++ b/src/api/endpoints/class-tainacan-rest-filters-controller.php
@@ -142,7 +142,7 @@ class REST_Filters_Controller extends REST_Controller {
 
 			$filter_obj->set_collection_id( $collection_id );
 
-			if(!$body['field']){
+			if(!isset($body['field'])){
 				throw new \InvalidArgumentException('You need provide a field id');
 			}
 
@@ -150,7 +150,7 @@ class REST_Filters_Controller extends REST_Controller {
 		} else {
 			$filter_obj->set_collection_id( 'filter_in_repository' );
 
-			if(!$body['field']){
+			if(!isset($body['field'])){
 				throw new \InvalidArgumentException('You need provide a field id');
 			}
 
diff --git a/src/classes/repositories/class-tainacan-collections.php b/src/classes/repositories/class-tainacan-collections.php
index bbb0adb36..d93ec7ea0 100644
--- a/src/classes/repositories/class-tainacan-collections.php
+++ b/src/classes/repositories/class-tainacan-collections.php
@@ -272,7 +272,7 @@ class Collections extends Repository {
 	 * @return mixed|Collection
 	 */
 	public function delete( $args ) {
-		if ( ! empty( $args[1] ) && $args[1] === true ) {
+		if ( ! empty( $args[1] ) && $args[1] == true ) {
 			$deleted = new Entities\Collection( wp_delete_post( $args[0], $args[1] ) );
 
 			if($deleted) {
diff --git a/src/classes/repositories/class-tainacan-filters.php b/src/classes/repositories/class-tainacan-filters.php
index e85b6d0b2..ece28938d 100644
--- a/src/classes/repositories/class-tainacan-filters.php
+++ b/src/classes/repositories/class-tainacan-filters.php
@@ -185,7 +185,7 @@ class Filters extends Repository {
      *
      */
     public function delete($args){
-	    if(!empty($args[1]) && $args[1] === true){
+	    if(!empty($args[1]) && $args[1] == true){
 
 	    	$deleted = new Entities\Filter(wp_delete_post($args[0], $args[1]));
 
diff --git a/src/classes/repositories/class-tainacan-taxonomies.php b/src/classes/repositories/class-tainacan-taxonomies.php
index 83f9383e9..45844c37c 100644
--- a/src/classes/repositories/class-tainacan-taxonomies.php
+++ b/src/classes/repositories/class-tainacan-taxonomies.php
@@ -186,7 +186,7 @@ class Taxonomies extends Repository {
 	    $taxonomy_name  = $args[1];
 	    $permanently    = $args[2];
 
-	    if($permanently === true){
+	    if($permanently == true){
 		    $unregistered = unregister_taxonomy($taxonomy_name);
 
 		    if($unregistered instanceof \WP_Error){
diff --git a/tests/test-api-filters.php b/tests/test-api-filters.php
index 15d9bc9a3..a0a4b57ee 100644
--- a/tests/test-api-filters.php
+++ b/tests/test-api-filters.php
@@ -257,13 +257,46 @@ class TAINACAN_REST_Terms_Controller extends TAINACAN_UnitApiTestCase {
 	}
 
 	public function test_create_and_fetch_filter_in_repository(){
+
+		$collection = $this->tainacan_entity_factory->create_entity(
+			'collection',
+			array(
+				'name'        => 'Collection filtered',
+				'description' => 'Is filtered',
+			),
+			true
+		);
+
+		$field = $this->tainacan_entity_factory->create_entity(
+			'field',
+			array(
+				'name'          => 'Field filtered',
+				'description'   => 'Is filtered',
+				'collection_id' => $collection->get_id(),
+				'field_type'    => 'Tainacan\Field_Types\Text'
+			),
+			true
+		);
+
+		$field2 = $this->tainacan_entity_factory->create_entity(
+			'field',
+			array(
+				'name'          => 'Field filtered',
+				'description'   => 'Is filtered',
+				'collection_id' => 'default',
+				'field_type'    => 'Tainacan\Field_Types\Text'
+			),
+			true
+		);
+
 		$filter_attr = json_encode([
 			'filter_type' => 'autocomplete',
 			'filter'      => [
 				'name'        => '2x Filter',
 				'description' => 'Description of 2x Filter',
 				'status'      => 'publish'
-			]
+			],
+			'field'       => $field2->get_id()
 		]);
 
 		$filter_attr2 = json_encode([
@@ -272,7 +305,8 @@ class TAINACAN_REST_Terms_Controller extends TAINACAN_UnitApiTestCase {
 				'name'        => '4x Filter',
 				'description' => 'Description of 4x Filter',
 				'status'      => 'publish'
-			]
+			],
+			'field'       => $field->get_id()
 		]);
 
 		#### CREATE A FILTER IN REPOSITORY ####