See MDLQA-1148. As tested on QA testing site.

156/203 test cases complete: 5647 passes, 11 fails and 1 exceptions.

Fail: lib/dml/simpletest/testdml.php / ► dml_test / ► test_diagnose
Database self diagnostics failed [String: Database tables are using MyISAM database engine, it is recommended to use ACID compliant engine with full transaction support such as InnoDB.] should be null at [/html/lib/dml/simpletest/testdml.php line 113]
Fail: lib/dml/simpletest/testdml.php / ► dml_test / ► test_unique_index_collation_trouble
Unique index is accent insensitive, this may cause problems for non-ascii languages. This is usually caused by accent insensitive default collation. at [/html/lib/dml/simpletest/testdml.php line 3058]
Exception: lib/dml/simpletest/testdml.php / ► dml_test / ► test_unique_index_collation_trouble
Unexpected exception of type [dml_write_exception] with message [Error writing to database] in [/html/lib/dml/moodle_database.php line 396]

Debug info:

Duplicate entry 'aäa' for key 'mdl_unittabl_nam_uix'
INSERT INTO mdl_unit_table (name) VALUES
[array (
0 => 'aäa',
)]

• line 878 of /lib/dml/mysqli_native_moodle_database.php: call to moodle_database->query_end()
• line 920 of /lib/dml/mysqli_native_moodle_database.php: call to mysqli_native_moodle_database->insert_record_raw()
• line 3052 of /lib/dml/simpletest/testdml.php: call to mysqli_native_moodle_database->insert_record()
• line ... of ...

Fail: lib/dml/simpletest/testdml.php / ► dml_test / ► test_sql_binary_equal
SQL operator "=" is expected to be accent sensitive at [/html/lib/dml/simpletest/testdml.php line 3086]
Fail: lib/dml/simpletest/testdml.php / ► dml_test / ► test_sql_binary_equal
SQL operator "=" is expected to be case sensitive at [/html/lib/dml/simpletest/testdml.php line 3089]
Fail: lib/dml/simpletest/testdml.php / ► dml_test / ► test_onelevel_rollback
Equal expectation fails because [Integer: 0] differs from [String: 1] by 1 at [/html/lib/dml/simpletest/testdml.php line 3596]
Fail: lib/dml/simpletest/testdml.php / ► dml_test / ► test_nested_transactions
Equal expectation fails because [Integer: 0] differs from [String: 2] by 2 at [/html/lib/dml/simpletest/testdml.php line 3642]
Fail: lib/dml/simpletest/testdml.php / ► dml_test / ► test_nested_transactions
Equal expectation fails because [Integer: 0] differs from [String: 2] by 2 at [/html/lib/dml/simpletest/testdml.php line 3671]
Fail: lib/dml/simpletest/testdml.php / ► dml_test / ► test_wrong_transactions
Equal expectation fails because [Integer: 0] differs from [String: 2] by 2 at [/html/lib/dml/simpletest/testdml.php line 3739]
Fail: lib/dml/simpletest/testdml.php / ► dml_test / ► test_concurent_transactions
Equal expectation fails because [Integer: 0] differs from [String: 1] by 1 at [/html/lib/dml/simpletest/testdml.php line 3825]
Fail: lib/dml/simpletest/testdml.php / ► dml_test / ► test_concurent_transactions
Equal expectation fails because [Integer: 1] differs from [String: 2] by 1 at [/html/lib/dml/simpletest/testdml.php line 3828]

Fail: lib/simpletest/testtextlib.php / ► textlib_test / ► test_asort
Collation aware sorting not supported, PHP extension "intl" is not available. at [/html/lib/simpletest/testtextlib.php line 59]