diff --git a/evaluate.py b/evaluate.py
index 21188d5..eefdb6b 100644
--- a/evaluate.py
+++ b/evaluate.py
@@ -25,6 +25,7 @@
 from seqeval.metrics import recall_score
 from third_party.evaluate_mlqa import evaluate as mlqa_eval
 from third_party.evaluate_squad import evaluate as squad_eval
+from third_party.utils_mewslix import evaluate as mewslix_eval
 
 
 def read_tag(file):
@@ -108,6 +109,12 @@ def mlqa_em_f1(labels, predictions, language):
   return mlqa_eval(labels, predictions, language)
 
 
+def mewslix_map20(labels, predictions, language=None):
+  del language
+  mrr = mewslix_eval(labels, predictions, k=20)
+  return {'map@20': mrr * 100}
+
+
 XTREME_GROUP2TASK = {
     'classification': ['pawsx', 'xnli'],
     'tagging': ['udpos', 'panx'],
@@ -120,7 +127,7 @@ def mlqa_em_f1(labels, predictions, language):
     'classification': ['xnli', 'xcopa'],
     'tagging': ['udpos', 'panx'],
     'qa': ['xquad', 'mlqa', 'tydiqa'],
-    'retrieval': ['tatoeba'],
+    'retrieval': ['tatoeba', 'mewslix'],
     'multi_choice': ['xcopa'],
 }
 
@@ -162,7 +169,7 @@ def mlqa_em_f1(labels, predictions, language):
                'ro'.split(','),
     'xcopa': 'et,ht,id,it,qu,sw,ta,th,tr,vi,zh'.split(','),
     'lareqa': [],
-    'mewslix': [],
+    'mewslix': 'ar,de,en,es,fa,ja,pl,ro,ta,tr,uk'.split(','),
     'xquad': 'en,es,de,el,ru,tr,ar,vi,th,zh,hi,ro'.split(','),
     'mlqa': 'en,es,de,ar,hi,vi,zh'.split(','),
     'tydiqa': 'en,ar,bn,fi,id,ko,ru,sw,te'.split(','),
@@ -183,6 +190,7 @@ def mlqa_em_f1(labels, predictions, language):
     'bucc2018': read_label,
     'tatoeba': read_label,
     'xquad': read_squad,
+    'mewslix': read_squad,
     'mlqa': read_squad,
     'tydiqa': read_squad,
     'xcopa': read_xcopa,
@@ -197,6 +205,7 @@ def mlqa_em_f1(labels, predictions, language):
     'bucc2018': bucc_f1,
     'tatoeba': accuracy,
     'xquad': squad_em_f1,
+    'mewslix': mewslix_map20,
     'mlqa': mlqa_em_f1,
     'tydiqa': squad_em_f1,
     'xcopa': accuracy,
@@ -219,7 +228,7 @@ def evaluate_one_task(prediction_file, label_file, task, language=None):
   """
   predictions = READER_FUNCTION[task](prediction_file)
   labels = READER_FUNCTION[task](label_file)
-  if task not in ['bucc2018', 'mlqa', 'tydiqa', 'xquad']:
+  if task not in ['bucc2018', 'mewslix', 'mlqa', 'tydiqa', 'xquad']:
     assert len(predictions) == len(labels), (
         'Number of examples in {} and {} not matched in {} task'.format(
             prediction_file, label_file, task))
@@ -227,6 +236,15 @@ def evaluate_one_task(prediction_file, label_file, task, language=None):
   return result
 
 
+def get_suffix(task, group2task):
+  if task in group2task['qa'] or task in ('mewslix',):
+    return 'json'
+  elif 'multi_choice' in group2task and task in group2task['multi_choice']:
+    return 'jsonl'
+  else:
+    return 'tsv'
+
+
 def evaluate(prediction_folder, label_folder, xtreme_version, verbose=False):
   """Evaluate on all tasks if available.
 
@@ -250,12 +268,7 @@ def evaluate(prediction_folder, label_folder, xtreme_version, verbose=False):
   detailed_scores = {}
   for task, langs in task2langs.items():
     if task in prediction_tasks and task in label_tasks:
-      if task in group2task['qa']:
-        suffix = 'json'
-      elif 'multi_choice' in group2task and task in group2task['multi_choice']:
-        suffix = 'jsonl'
-      else:
-        suffix = 'tsv'
+      suffix = get_suffix(task, group2task)
       # collect scores over all languages
       score = collections.defaultdict(dict)
       for lg in langs:
diff --git a/evaluate_test.py b/evaluate_test.py
index 240d143..6d4874e 100644
--- a/evaluate_test.py
+++ b/evaluate_test.py
@@ -20,12 +20,15 @@
 from absl.testing import absltest
 from absl.testing import parameterized
 from xtreme.evaluate import evaluate_one_task
+from xtreme.evaluate import get_suffix
 from xtreme.evaluate import XTREME_GROUP2TASK
+from xtreme.evaluate import XTREME_R_GROUP2TASK
+from xtreme.evaluate import XTREME_R_TASK2LANGS
 from xtreme.evaluate import XTREME_TASK2LANGS
 
 DATA_DIR = './/mock_test_data'
 
-# Mock submission scores for testing
+# Mock submission scores for testing XTREME.
 TASK2AVG_SCORES = {
     'pawsx': {'avg_accuracy': 51.42857142857143},
     'xnli': {'avg_accuracy': 30.666666666666668},
@@ -40,6 +43,24 @@
     'tydiqa': {'avg_exact_match': 88.88888888888889, 'avg_f1': 97.22222222222223}
 }
 
+# Mock submission scores for testing XTREME-R.
+  # TODO(ruder): Update data/numbers for tasks with added languages (UD-POS,
+  # PANX, Tatoeba, and XQuAD) and for new tasks (XCOPA, LAReQA).
+XTREME_R_TASK2AVG_SCORES = {
+    'xnli': {'avg_accuracy': 30.666666666666668},
+    # 'panx': {'avg_f1': 57.50793650793652, 'avg_precision': 54.729166666666664,
+    #          'avg_recall': 62.750000000000014},
+    # 'udpos': {'avg_f1': 70.21746048354693, 'avg_precision': 71.02232625883823,
+    #           'avg_recall': 69.54982073976082},
+    # 'tatoeba': {'avg_accuracy': 53.611111111111114},
+    # 'xcopa'
+    # 'lareqa'
+    'mewslix': {'avg_map@20': 14.39025156130419},
+    # 'xquad': {'avg_exact_match': 77.27272727272727, 'avg_f1': 79.9586776859504},
+    'mlqa': {'avg_exact_match': 57.142857142857146, 'avg_f1': 81.76870748299321},
+    'tydiqa': {'avg_exact_match': 88.88888888888889, 'avg_f1': 97.22222222222223}
+}
+
 
 class EvaluateTest(parameterized.TestCase):
   """Test cases for evaluate.py."""
@@ -54,7 +75,7 @@ class EvaluateTest(parameterized.TestCase):
       ('XQuAD', 'xquad'),
       ('MLQA', 'mlqa'),
       ('TyDiQA', 'tydiqa'))
-  def testTask(self, task):
+  def testXtremeTask(self, task):
     data_dir = os.path.join(absltest.get_default_test_srcdir(), DATA_DIR)
     suffix = 'json' if task in XTREME_GROUP2TASK['qa'] else 'tsv'
     score = collections.defaultdict(dict)
@@ -71,5 +92,32 @@ def testTask(self, task):
     self.assertEqual(avg_score, TASK2AVG_SCORES[task])
 
 
+  @parameterized.named_parameters(
+      ('XNLI', 'xnli'),
+      # ('PANX', 'panx'),
+      # ('UDPOS', 'udpos'),
+      # ('Tatoeba', 'tatoeba'),
+      # ('XCOPA', 'xcopa'),
+      # ('LAReQA', 'lareqa'),
+      ('Mewsli-X', 'mewslix'),
+      # ('XQuAD', 'xquad'),
+      ('MLQA', 'mlqa'),
+      ('TyDiQA', 'tydiqa'))
+  def testXtremeRTask(self, task):
+    data_dir = os.path.join(absltest.get_default_test_srcdir(), DATA_DIR)
+    suffix = get_suffix(task, XTREME_R_GROUP2TASK)
+    score = collections.defaultdict(dict)
+    for lg in XTREME_R_TASK2LANGS[task]:
+      pred_file = os.path.join(data_dir, 'predictions', task,
+                               f'test-{lg}.{suffix}')
+      label_file = os.path.join(data_dir, 'labels', task, f'test-{lg}.{suffix}')
+      score_lg = evaluate_one_task(pred_file, label_file, task, language=lg)
+      for metric in score_lg:
+        score[metric][lg] = score_lg[metric]
+    avg_score = {}
+    for m in score:
+      avg_score[f'avg_{m}'] = sum(score[m].values()) / len(score[m])
+    self.assertEqual(avg_score, XTREME_R_TASK2AVG_SCORES[task])
+
 if __name__ == '__main__':
   absltest.main()
diff --git a/mock_test_data/labels/mewslix/test-ar.json b/mock_test_data/labels/mewslix/test-ar.json
new file mode 100644
index 0000000..7c1deee
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-ar.json
@@ -0,0 +1 @@
+{"8e18e51eced73e6495df0043192edbfe": ["Q46930"]}
\ No newline at end of file
diff --git a/mock_test_data/labels/mewslix/test-de.json b/mock_test_data/labels/mewslix/test-de.json
new file mode 100644
index 0000000..cd5111b
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-de.json
@@ -0,0 +1 @@
+{"4be5a1742223cc3a8c01e6bf9c6e3f27": ["Q156913"]}
\ No newline at end of file
diff --git a/mock_test_data/labels/mewslix/test-en.json b/mock_test_data/labels/mewslix/test-en.json
new file mode 100644
index 0000000..be723eb
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-en.json
@@ -0,0 +1 @@
+{"64ca9e2f229acf8e39c2a3d2e45f81e7": ["Q720285"]}
\ No newline at end of file
diff --git a/mock_test_data/labels/mewslix/test-es.json b/mock_test_data/labels/mewslix/test-es.json
new file mode 100644
index 0000000..9290987
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-es.json
@@ -0,0 +1 @@
+{"4a2d7fd3e4791f09bc3c804a15d647ef": ["Q786"]}
\ No newline at end of file
diff --git a/mock_test_data/labels/mewslix/test-fa.json b/mock_test_data/labels/mewslix/test-fa.json
new file mode 100644
index 0000000..d6bc05a
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-fa.json
@@ -0,0 +1 @@
+{"d35cc57a7869168ddeb8143c1b2260f3": ["Q76"]}
\ No newline at end of file
diff --git a/mock_test_data/labels/mewslix/test-ja.json b/mock_test_data/labels/mewslix/test-ja.json
new file mode 100644
index 0000000..633dbc8
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-ja.json
@@ -0,0 +1 @@
+{"d0e7a9dd0359610c53bba176d702dfce": ["Q174691"]}
\ No newline at end of file
diff --git a/mock_test_data/labels/mewslix/test-pl.json b/mock_test_data/labels/mewslix/test-pl.json
new file mode 100644
index 0000000..623e696
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-pl.json
@@ -0,0 +1 @@
+{"64232b8a3c3ee67f76f96ccd963b78f7": ["Q1362561"]}
\ No newline at end of file
diff --git a/mock_test_data/labels/mewslix/test-ro.json b/mock_test_data/labels/mewslix/test-ro.json
new file mode 100644
index 0000000..a14d6af
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-ro.json
@@ -0,0 +1 @@
+{"ebd92132adbb679fdd090503cd925f81": ["Q185007"]}
\ No newline at end of file
diff --git a/mock_test_data/labels/mewslix/test-ta.json b/mock_test_data/labels/mewslix/test-ta.json
new file mode 100644
index 0000000..ce6c1d4
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-ta.json
@@ -0,0 +1 @@
+{"12760cb39680a822c3cd0c8495cf1b4b": ["Q11468"]}
\ No newline at end of file
diff --git a/mock_test_data/labels/mewslix/test-tr.json b/mock_test_data/labels/mewslix/test-tr.json
new file mode 100644
index 0000000..35fadf3
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-tr.json
@@ -0,0 +1 @@
+{"9f39acb0fef259aaf24224fe41954f6c": ["Q258"]}
\ No newline at end of file
diff --git a/mock_test_data/labels/mewslix/test-uk.json b/mock_test_data/labels/mewslix/test-uk.json
new file mode 100644
index 0000000..1e69387
--- /dev/null
+++ b/mock_test_data/labels/mewslix/test-uk.json
@@ -0,0 +1 @@
+{"9f4dba86a6d21cfd246353403da46abd": ["Q1899"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-ar.json b/mock_test_data/predictions/mewslix/test-ar.json
new file mode 100644
index 0000000..6aaa93a
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-ar.json
@@ -0,0 +1 @@
+{"8e18e51eced73e6495df0043192edbfe": ["Q4963862", "Q42309905", "Q45789", "Q13403337", "Q5564588", "Q4009605", "Q1635932", "Q4980057", "Q5958027", "Q233750", "Q2922959", "Q203023", "Q2425422", "Q2340576", "Q4639323", "Q46930", "Q66891", "Q5423986", "Q15556629", "Q1347825"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-de.json b/mock_test_data/predictions/mewslix/test-de.json
new file mode 100644
index 0000000..a6a5ad7
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-de.json
@@ -0,0 +1 @@
+{"4be5a1742223cc3a8c01e6bf9c6e3f27": ["Q11490423", "Q156913", "Q490356", "Q16222746", "Q4873731", "Q2102531", "Q209944", "Q4630241", "Q9033638", "Q18249334", "Q65216438", "Q333185", "Q2530561", "Q20013418", "Q10826362", "Q2575270", "Q2914850", "Q55697199", "Q853167", "Q111730"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-en.json b/mock_test_data/predictions/mewslix/test-en.json
new file mode 100644
index 0000000..39729c6
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-en.json
@@ -0,0 +1 @@
+{"64ca9e2f229acf8e39c2a3d2e45f81e7": ["Q82674", "Q13551861", "Q2418898", "Q198748", "Q1146387", "Q6730240", "Q6769706", "Q2315496", "Q3375182", "Q711611", "Q55732114", "Q720285", "Q4760035", "Q28670149", "Q375278", "Q260559", "Q82840", "Q878942", "Q269810", "Q427535"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-es.json b/mock_test_data/predictions/mewslix/test-es.json
new file mode 100644
index 0000000..d935182
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-es.json
@@ -0,0 +1 @@
+{"4a2d7fd3e4791f09bc3c804a15d647ef": ["Q6151759", "Q19904197", "Q1138905", "Q440165", "Q787524", "Q13050046", "Q15748660", "Q6604140", "Q11400285", "Q20071151", "Q2912875", "Q786", "Q1999706", "Q11398056", "Q4486275", "Q3744158", "Q63524702", "Q38745473", "Q37996883", "Q29260670"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-fa.json b/mock_test_data/predictions/mewslix/test-fa.json
new file mode 100644
index 0000000..6a998c8
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-fa.json
@@ -0,0 +1 @@
+{"d35cc57a7869168ddeb8143c1b2260f3": ["Q333972", "Q48270", "Q5254564", "Q76", "Q5947394", "Q3151708", "Q1756916", "Q63091766", "Q13104276", "Q5839704", "Q6598064", "Q1008989", "Q48762758", "Q55842144", "Q461358", "Q447087", "Q13640998", "Q535894", "Q223278", "Q3504372"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-ja.json b/mock_test_data/predictions/mewslix/test-ja.json
new file mode 100644
index 0000000..4683f3a
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-ja.json
@@ -0,0 +1 @@
+{"d0e7a9dd0359610c53bba176d702dfce": ["Q1210312", "Q3662301", "Q2877167", "Q13548902", "Q3458109", "Q65159649", "Q49892", "Q204547", "Q12699816", "Q372592", "Q1776619", "Q16633277", "Q1658454", "Q174691", "Q1053638", "Q23653996", "Q798074", "Q24939391", "Q8037644", "Q65967892"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-pl.json b/mock_test_data/predictions/mewslix/test-pl.json
new file mode 100644
index 0000000..ad18d54
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-pl.json
@@ -0,0 +1 @@
+{"64232b8a3c3ee67f76f96ccd963b78f7": ["Q1033066", "Q565472", "Q11598441", "Q29522", "Q16027287", "Q1174348", "Q1052293", "Q16903684", "Q12860947", "Q48769622", "Q2606279", "Q7315521", "Q268776", "Q13621486", "Q1400430", "Q7124665", "Q11280748", "Q710911", "Q1362561", "Q34754"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-ro.json b/mock_test_data/predictions/mewslix/test-ro.json
new file mode 100644
index 0000000..635add1
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-ro.json
@@ -0,0 +1 @@
+{"ebd92132adbb679fdd090503cd925f81": ["Q1144739", "Q5836568", "Q20582855", "Q1311", "Q711832", "Q185007", "Q311559", "Q50391138", "Q55418237", "Q5037965", "Q601712", "Q6654524", "Q615949", "Q980941", "Q5188638", "Q15060144", "Q6737309", "Q21670139", "Q1040955", "Q928053"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-ta.json b/mock_test_data/predictions/mewslix/test-ta.json
new file mode 100644
index 0000000..4ee474d
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-ta.json
@@ -0,0 +1 @@
+{"12760cb39680a822c3cd0c8495cf1b4b": ["Q22959171", "Q13385006", "Q608803", "Q3046191", "Q1750336", "Q15353797", "Q1695555", "Q124473", "Q836937", "Q3297349", "Q430687", "Q2181287", "Q11468", "Q20393369", "Q888226", "Q56477015", "Q22692651", "Q13829184", "Q2479497", "Q3207103"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-tr.json b/mock_test_data/predictions/mewslix/test-tr.json
new file mode 100644
index 0000000..a887e8f
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-tr.json
@@ -0,0 +1 @@
+{"9f39acb0fef259aaf24224fe41954f6c": ["Q11350542", "Q188447", "Q15905812", "Q15868", "Q6630136", "Q6734763", "Q105927", "Q258", "Q9181720", "Q313196", "Q4099359", "Q15567185", "Q587455", "Q190436", "Q5284896", "Q18709782", "Q16233625", "Q5246694", "Q11620425", "Q12568992"]}
\ No newline at end of file
diff --git a/mock_test_data/predictions/mewslix/test-uk.json b/mock_test_data/predictions/mewslix/test-uk.json
new file mode 100644
index 0000000..e291854
--- /dev/null
+++ b/mock_test_data/predictions/mewslix/test-uk.json
@@ -0,0 +1 @@
+{"9f4dba86a6d21cfd246353403da46abd": ["Q524624", "Q3830755", "Q3800390", "Q508679", "Q20383186", "Q930701", "Q18682623", "Q16969424", "Q1899", "Q2320371", "Q266613", "Q2469647", "Q749794", "Q6241038", "Q5754881", "Q2879448", "Q1630799", "Q447", "Q628319", "Q25515301"]}
\ No newline at end of file