diff --git a/tests/phpunit/data/formatting/big5.txt b/tests/phpunit/data/formatting/big5.txt
index 5e0ebb467b..a0ab6e4537 100644
--- a/tests/phpunit/data/formatting/big5.txt
+++ b/tests/phpunit/data/formatting/big5.txt
@@ -1,51 +1,5 @@
-?lmDwgn H@~|Q
-
-?lDg
-
-H@
-
-DiDAD`DCWiWAD`WCLAW?alQAWUC
-G`LAH[?F`AH[uC?APX?WAP?
-?C?S?AC
-
-HG
-
-?U?AcoQ?AoCGL??A
-?Au??AU?gAn?MAeHCOHtHBuL
-voAuv?CU@j?A??A?A\
-?~C??~AOHhC
-
-HT
-
-|A?QQofA?sQiA??
-COHutHvvA?A?Az?Aj?C`?LL
-C???]CuLvAhLvC
-
-h|
-
-uDvRA????CWAUvQUA?gAM
-AP?Q?FsC^?lHH?C
-
-H
-
-?aAHU?QtHAH?m?C?aAS
-GH?}A??UXCh?aApuC
-
-H
-
-AO??gC??AO??a?CYsA??C
-
-HC
-
-?a[C?a?HB[?AH???AG[COHtH
-?A~??sCDHLpHG?pC
-
-HK
-
-WYCQU?CBH?cAGXDC~aA?
-WAPAHAFvA?A?gC??AGL?C
-
-HE
-
-??ApwQ?UAiOC?AuQIQ
-zA?SC\EhA?DC
+版本
+分類
+環境
+性質
+首頁
diff --git a/tests/phpunit/tests/formatting/SeemsUtf8.php b/tests/phpunit/tests/formatting/SeemsUtf8.php
index c9fc26fbbd..70742c3afa 100644
--- a/tests/phpunit/tests/formatting/SeemsUtf8.php
+++ b/tests/phpunit/tests/formatting/SeemsUtf8.php
@@ -10,7 +10,7 @@ class Tests_Formatting_SeemsUtf8 extends WP_UnitTestCase {
 	 *
 	 * @dataProvider utf8_strings
 	 */
-    function test_returns_true_for_utf8_strings( $utf8_string ) {
+	function test_returns_true_for_utf8_strings( $utf8_string ) {
 		// from http://www.i18nguy.com/unicode-example.html
 		$this->assertTrue( seems_utf8( $utf8_string ) );
 	}
@@ -28,19 +28,17 @@ class Tests_Formatting_SeemsUtf8 extends WP_UnitTestCase {
 	 * @dataProvider big5_strings
 	 */
 	function test_returns_false_for_non_utf8_strings( $big5_string ) {
-		$this->markTestIncomplete( 'This test does not have any assertions.' );
-
-		$big5 = $big5[0];
-		$strings = array(
-			"abc",
-			"123",
-			$big5
-		);
+		$this->assertFalse( seems_utf8( $big5_string ) );
 	}
 
 	function big5_strings() {
 		// Get data from formatting/big5.txt
-		return array( array( 'incomplete' ) );
+		$big5_strings = file( DIR_TESTDATA . '/formatting/big5.txt' );
+		foreach ( $big5_strings as &$string ) {
+			$string = (array) trim( $string );
+		}
+		unset( $string );
+		return $big5_strings;
 	}
 }