diff --git a/samples/otlptrace/README.md b/samples/otlptrace/README.md
index 80eb3411..fe19da65 100644
--- a/samples/otlptrace/README.md
+++ b/samples/otlptrace/README.md
@@ -24,7 +24,6 @@ gcloud auth application-default login
 ```sh
 # export necessary OTEL environment variables
 export OTEL_RESOURCE_ATTRIBUTES="gcp.project_id=<project-id>"
-export OTEL_EXPORTER_OTLP_ENDPOINT=<endpoint>
 
 # from the samples/otlptrace repository
 python3 example_grpc.py
diff --git a/samples/otlptrace/example_grpc.py b/samples/otlptrace/example_grpc.py
index 80980f52..8c59f1f9 100644
--- a/samples/otlptrace/example_grpc.py
+++ b/samples/otlptrace/example_grpc.py
@@ -46,6 +46,7 @@
 processor = BatchSpanProcessor(
     OTLPSpanExporter(
         credentials=channel_creds,
+        endpoint="https://telemetry.googleapis.com:443/v1/traces",
     )
 )
 trace_provider.add_span_processor(processor)
diff --git a/samples/otlptrace/example_http.py b/samples/otlptrace/example_http.py
index a613beed..4694cc01 100644
--- a/samples/otlptrace/example_http.py
+++ b/samples/otlptrace/example_http.py
@@ -31,6 +31,7 @@
 processor = BatchSpanProcessor(
     OTLPSpanExporter(
         session=AuthorizedSession(credentials),
+        endpoint="https://telemetry.googleapis.com:443/v1/traces",
     )
 )
 trace_provider.add_span_processor(processor)