diff --git a/docs/serving/samples/hello-world/helloworld-python/Dockerfile b/docs/serving/samples/hello-world/helloworld-python/Dockerfile
index f33c7710b..a84faddcb 100644
--- a/docs/serving/samples/hello-world/helloworld-python/Dockerfile
+++ b/docs/serving/samples/hello-world/helloworld-python/Dockerfile
@@ -2,6 +2,9 @@
 # https://hub.docker.com/_/python
 FROM python:3.7-slim
 
+# Allow statements and log messages to immediately appear in the Knative logs
+ENV PYTHONUNBUFFERED True
+
 # Copy local code to the container image.
 ENV APP_HOME /app
 WORKDIR $APP_HOME
diff --git a/docs/serving/samples/hello-world/helloworld-python/README.md b/docs/serving/samples/hello-world/helloworld-python/README.md
index 04ee061ba..94cf4eb4d 100644
--- a/docs/serving/samples/hello-world/helloworld-python/README.md
+++ b/docs/serving/samples/hello-world/helloworld-python/README.md
@@ -55,6 +55,9 @@ cd knative-docs/docs/serving/samples/hello-world/helloworld-python
    # https://hub.docker.com/_/python
    FROM python:3.7-slim
 
+   # Allow statements and log messages to immediately appear in the Knative logs
+   ENV PYTHONUNBUFFERED True
+
    # Copy local code to the container image.
    ENV APP_HOME /app
    WORKDIR $APP_HOME