diff --git a/includes/Classifai/Helpers.php b/includes/Classifai/Helpers.php
index efc292355..de5fa66b7 100644
--- a/includes/Classifai/Helpers.php
+++ b/includes/Classifai/Helpers.php
@@ -191,10 +191,6 @@ function get_supported_post_types() {
 		}
 	}
 
-	if ( empty( $post_types ) ) {
-		$post_types = [ 'post' ];
-	}
-
 	/**
 	 * Filter post types supported for language processing.
 	 *
diff --git a/tests/Classifai/HelpersTest.php b/tests/Classifai/HelpersTest.php
index 096c30d04..318e0fa10 100644
--- a/tests/Classifai/HelpersTest.php
+++ b/tests/Classifai/HelpersTest.php
@@ -29,7 +29,7 @@ function test_it_has_plugin_settings() {
 
 	function test_it_has_default_supported_post_types() {
 		$actual = get_supported_post_types();
-		$this->assertEquals( [ 'post' ], $actual );
+		$this->assertEquals( [], $actual );
 	}
 
 	function test_it_can_lookup_supported_post_types_from_option() {
diff --git a/tests/Classifai/Taxonomy/TaxonomyFactoryTest.php b/tests/Classifai/Taxonomy/TaxonomyFactoryTest.php
index 44e8c84e2..7ba26d06d 100644
--- a/tests/Classifai/Taxonomy/TaxonomyFactoryTest.php
+++ b/tests/Classifai/Taxonomy/TaxonomyFactoryTest.php
@@ -52,6 +52,10 @@ function test_it_can_build_all_supported_taxonomies() {
 	}
 
 	function test_it_connects_watson_taxonomies_to_post_type() {
+		add_filter( 'classifai_post_types', function() {
+			return [ 'post' ];
+		} );
+
 		$this->factory->build_all();
 
 		$actual = get_object_taxonomies( 'post' );