diff --git a/tests/framework/validators/DateValidatorTest.php b/tests/framework/validators/DateValidatorTest.php
index <HASH>..<HASH> 100644
--- a/tests/framework/validators/DateValidatorTest.php
+++ b/tests/framework/validators/DateValidatorTest.php
@@ -303,6 +303,7 @@ class DateValidatorTest extends TestCase
         // prepare data for specific ICU version, see https://github.com/yiisoft/yii2/issues/15140
         switch (true) {
             case (version_compare(INTL_ICU_VERSION, '57.1', '>=')):
+            case (INTL_ICU_VERSION === '55.1'):
                 $enGB_dateTime_valid = '31/05/2017, 12:30';
                 $enGB_dateTime_invalid = '05/31/2017, 12:30';
                 $deDE_dateTime_valid = '31.05.2017, 12:30';
Fixed INTL version tests adaptation

Checked on my Ubuntu <I> LTS