diff --git a/src/wp-includes/https-detection.php b/src/wp-includes/https-detection.php
index f834549f95..c9f17c7ae3 100644
--- a/src/wp-includes/https-detection.php
+++ b/src/wp-includes/https-detection.php
@@ -143,12 +143,8 @@ function wp_update_https_detection_errors() {
 		$response = $unverified_response;
 	}
 
-	if ( ! is_wp_error( $response ) ) {
-		if ( 200 !== wp_remote_retrieve_response_code( $response ) ) {
-			$support_errors->add( 'bad_response_code', wp_remote_retrieve_response_message( $response ) );
-		} elseif ( false === wp_is_local_html_output( wp_remote_retrieve_body( $response ) ) ) {
-			$support_errors->add( 'bad_response_source', __( 'It looks like the response did not come from this site.' ) );
-		}
+	if ( ! is_wp_error( $response ) && 200 !== wp_remote_retrieve_response_code( $response ) ) {
+		$support_errors->add( 'bad_response_code', wp_remote_retrieve_response_message( $response ) );
 	}
 
 	update_option( 'https_detection_errors', $support_errors->errors );
diff --git a/tests/phpunit/tests/https-detection.php b/tests/phpunit/tests/https-detection.php
index acc123ee6d..c437506bb5 100644
--- a/tests/phpunit/tests/https-detection.php
+++ b/tests/phpunit/tests/https-detection.php
@@ -97,15 +97,6 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 			get_option( 'https_detection_errors' )
 		);
 
-		// If request succeeds, but response was not generated by this
-		// WordPress site, return error with 'bad_response_source' error code.
-		add_filter( 'pre_http_request', array( $this, 'mock_bad_source' ), 10, 2 );
-		wp_update_https_detection_errors();
-		$this->assertSame(
-			array( 'bad_response_source' => array( 'It looks like the response did not come from this site.' ) ),
-			get_option( 'https_detection_errors' )
-		);
-
 		// Check that the requests are made to the correct URL.
 		$this->assertSame( 'https://example.com/', $this->last_request_url );
 	}
@@ -307,17 +298,6 @@ class Tests_HTTPS_Detection extends WP_UnitTestCase {
 		);
 	}
 
-	public function mock_bad_source() {
-		// Looks like a success response, but is not generated by WordPress (e.g. missing RSD link).
-		return array(
-			'body'     => $this->get_sample_html_string(),
-			'response' => array(
-				'code'    => 200,
-				'message' => 'OK',
-			),
-		);
-	}
-
 	private function mock_success() {
 		// Success response containing RSD link.
 		return array(