diff --git a/Makefile b/Makefile
index ad643e80..db103f5b 100644
--- a/Makefile
+++ b/Makefile
@@ -8,11 +8,11 @@ clean:
 
 .PHONY: build
 build:
-	docker build -t docker-sdk-python -f tests/Dockerfile --build-arg PYTHON_VERSION=2.7 .
+	docker build -t docker-sdk-python -f tests/Dockerfile --build-arg PYTHON_VERSION=2.7 --build-arg APT_MIRROR .
 
 .PHONY: build-py3
 build-py3:
-	docker build -t docker-sdk-python3 -f tests/Dockerfile .
+	docker build -t docker-sdk-python3 -f tests/Dockerfile --build-arg APT_MIRROR .
 
 .PHONY: build-docs
 build-docs:
diff --git a/tests/Dockerfile b/tests/Dockerfile
index 4bd98f87..df8468ab 100644
--- a/tests/Dockerfile
+++ b/tests/Dockerfile
@@ -1,6 +1,11 @@
 ARG PYTHON_VERSION=3.7
 
 FROM python:${PYTHON_VERSION}
+
+ARG APT_MIRROR
+RUN sed -ri "s/(httpredir|deb).debian.org/${APT_MIRROR:-deb.debian.org}/g" /etc/apt/sources.list \
+ && sed -ri "s/(security).debian.org/${APT_MIRROR:-security.debian.org}/g" /etc/apt/sources.list
+
 RUN apt-get update && apt-get -y install \
     gnupg2 \
     pass \