diff --git a/yandextank/plugins/InfluxUploader/decoder.py b/yandextank/plugins/InfluxUploader/decoder.py
index bd9059e92..c38530843 100644
--- a/yandextank/plugins/InfluxUploader/decoder.py
+++ b/yandextank/plugins/InfluxUploader/decoder.py
@@ -49,7 +49,8 @@ def decode_monitoring(self, data):
                         {"host": host, "comment": host_data.get("comment")},
                         second_data["timestamp"],
                         {
-                            metric: value
+                            # cast int to float. avoid https://github.com/yandex/yandex-tank/issues/776
+                            metric: float(value) if isinstance(value, int) else value
                             for metric, value in host_data["metrics"].iteritems()
                         }
                     )
diff --git a/yandextank/plugins/InfluxUploader/tests/test_decoder.py b/yandextank/plugins/InfluxUploader/tests/test_decoder.py
new file mode 100644
index 000000000..0ac12d06a
--- /dev/null
+++ b/yandextank/plugins/InfluxUploader/tests/test_decoder.py
@@ -0,0 +1,65 @@
+# -*- coding: utf-8 -*-
+from uuid import uuid4
+from yandextank.plugins.InfluxUploader.decoder import Decoder
+
+
+class TestDecoder(object):
+    def test_metrics_cast(self):
+        test_uuid = str(uuid4())
+        tank_tag = 'test_tank_tag'
+        comment = 'test comment'
+        raw_metrics = {
+            'metric1': -123,
+            'metric2': -123.456,
+            'metric3': 123,
+            'metric4': 123.456,
+            'metric5': 0,
+            'metric6': -0.1,
+            'metric7': 0.1,
+            'metric8': 'down',
+        }
+        timestamp = 123456789
+        host = '127.0.0.1'
+        data = [
+            {
+                'data': {
+                    host: {
+                        'comment': comment,
+                        'metrics': raw_metrics
+                    }
+                },
+                'timestamp': timestamp
+            }
+        ]
+        expected_metrics = {
+            'metric1': -123.0,
+            'metric2': -123.456,
+            'metric3': 123.0,
+            'metric4': 123.456,
+            'metric5': 0.0,
+            'metric6': -0.1,
+            'metric7': 0.1,
+            'metric8': 'down'
+        }
+
+        decoder = Decoder(tank_tag, test_uuid, {}, True, True)
+        result_points = decoder.decode_monitoring(data)
+
+        assert (len(result_points) == 1)
+        r_point = result_points[0]
+        # check other props
+        assert (r_point['time'] == timestamp)
+        assert (r_point['measurement'] == 'monitoring')
+        assert (r_point['tags']['comment'] == comment)
+        assert (r_point['tags']['host'] == host)
+        assert (r_point['tags']['tank'] == tank_tag)
+        assert (r_point['tags']['uuid'] == test_uuid)
+        # check metric cast
+        assert (len(r_point['fields']) == len(expected_metrics))
+        for metric, value in r_point['fields'].iteritems():
+            if metric not in expected_metrics:
+                assert False
+            if not isinstance(value, type(expected_metrics[metric])):
+                assert False
+            if not value == expected_metrics[metric]:
+                assert False