diff --git a/exporter/opentelemetry-exporter-otlp-proto-common/tests/test_attribute_encoder.py b/exporter/opentelemetry-exporter-otlp-proto-common/tests/test_attribute_encoder.py
index 01856611036..be4f58367cc 100644
--- a/exporter/opentelemetry-exporter-otlp-proto-common/tests/test_attribute_encoder.py
+++ b/exporter/opentelemetry-exporter-otlp-proto-common/tests/test_attribute_encoder.py
@@ -36,6 +36,7 @@ def test_encode_attributes_all_kinds(self):
                 "greet": ["hola", "bonjour"],  # Sequence[str]
                 "data": [1, 2],  # Sequence[int]
                 "data_granular": [1.4, 2.4],  # Sequence[float]
+                "binary_data": b'x00\x01\x02' #bytes
             }
         )
         self.assertEqual(
@@ -80,6 +81,10 @@ def test_encode_attributes_all_kinds(self):
                         )
                     ),
                 ),
+                PB2AnyValue(
+                    key="binary_data",
+                    value=PB2AnyValue(bytes_value=b'x00\x01\x02'),
+                ),
             ],
         )