diff --git a/tests/unit/serve/instrumentation/conftest.py b/tests/unit/serve/instrumentation/conftest.py
index 77bff13945578..ad66789e2aeed 100644
--- a/tests/unit/serve/instrumentation/conftest.py
+++ b/tests/unit/serve/instrumentation/conftest.py
@@ -27,6 +27,7 @@ def __init__(
             type, "opentelemetry.sdk.metrics.view.Aggregation"
         ] = None,
     ):
+        print(f'JOAN IS HERE DIRMETRIC')
         super().__init__(
             preferred_temporality=preferred_temporality,
             preferred_aggregation=preferred_aggregation,
@@ -40,6 +41,7 @@ def export(
         timeout_millis: float = 10_000,
         **kwargs,
     ) -> MetricExportResult:
+        print(f'export to {self.metric_filename} => {metrics_data.to_json()[0:3]}')
         self.f.write(metrics_data.to_json())
         self.f.write('\n')
         self.f.flush()
@@ -75,6 +77,7 @@ def monkeypatch_metric_exporter(
         f.write('0')
 
     def collect_metrics():
+        print(f'tick_counter_filename {tick_counter_filename}')
         with open(tick_counter_filename, 'r', encoding='utf-8') as ft:
             tick_counter = int(ft.read())
         with open(tick_counter_filename, 'w', encoding='utf-8') as ft2:
@@ -88,15 +91,20 @@ def _get_service_name(otel_measurement):
 
     def read_metrics():
         def read_metric_file(filename):
+            print(f'filename {filename}')
             with open(filename, 'r', encoding='utf-8') as fr:
                 r = fr.read()
-                print(f'READ {r}')
-                return json.loads(r)
-
-        return {
-            _get_service_name(i): i
-            for i in map(read_metric_file, metrics_path.glob('*'))
-        }
+                print(f'READ {r[0:3]}')
+                try:
+                    return json.loads(r)
+                except:
+                    return None
+
+        ret = {}
+        for i in map(read_metric_file, metrics_path.glob('*')):
+            if i is not None:
+                ret[_get_service_name(i)] = i
+        return ret
 
     class PatchedTextReader(PeriodicExportingMetricReader):
         def __init__(self, *args, **kwargs) -> None:
diff --git a/tests/unit/serve/instrumentation/test_gateway_metric_labels.py b/tests/unit/serve/instrumentation/test_gateway_metric_labels.py
index 2d8eb08f0ff2d..757d2d9e41756 100644
--- a/tests/unit/serve/instrumentation/test_gateway_metric_labels.py
+++ b/tests/unit/serve/instrumentation/test_gateway_metric_labels.py
@@ -26,7 +26,6 @@ def meow(self, docs, **kwargs):
         f.post('/')
         collect_metrics()
         metrics = read_metrics()
-        print(f' metrics {metrics.keys()}')
         gateway_metrics = metrics['gateway/rep-0']['resource_metrics'][0][
             'scope_metrics'
         ][0]['metrics']
diff --git a/tests/unit/serve/instrumentation/test_instrumentation.py b/tests/unit/serve/instrumentation/test_instrumentation.py
index c1d1d8228cba8..d83dd0d65c559 100644
--- a/tests/unit/serve/instrumentation/test_instrumentation.py
+++ b/tests/unit/serve/instrumentation/test_instrumentation.py
@@ -88,10 +88,10 @@ def _sleep():
     }
 
     @MetricsTimer(summary, histogram, labels)
-    def _sleep():
+    def _sleep_2():
         time.sleep(0.1)
 
-    _sleep()
+    _sleep_2()
 
     # Prometheus samples
     summary_count_sample = [
@@ -107,5 +107,5 @@ def _sleep():
         .to_json()
     )
     assert 'time_taken_decorator' == histogram_metric['name']
-    assert 1 == histogram_metric['data']['data_points'][0]['count']
-    assert labels == histogram_metric['data']['data_points'][0]['attributes']
+    assert 1 == histogram_metric['data']['data_points'][1]['count']
+    assert labels == histogram_metric['data']['data_points'][1]['attributes']