diff --git a/docker/buster/Dockerfile b/docker/buster/Dockerfile
index 16c17650787e1dd9be30a3ef99b5685b9a2ab6cc..a6fbfbca90acb88b81e72b7de8ca2ef551b94fdc 100644
--- a/docker/buster/Dockerfile
+++ b/docker/buster/Dockerfile
@@ -5,7 +5,7 @@ WORKDIR acme_dns_tiny
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
     python3-minimal python3-dnspython python3-requests \
-    python3-coverage python3-lint \
+    python3-coverage pylint3 \
     && apt-get clean
 
 COPY . .
diff --git a/docker/jessie/Dockerfile b/docker/jessie/Dockerfile
index f562a560edaf698dd1c7f1c6b8eceea9b7bf5586..1572c8c00513c8d6fcf511ce9dbe54afd5fbe53c 100644
--- a/docker/jessie/Dockerfile
+++ b/docker/jessie/Dockerfile
@@ -1,7 +1,11 @@
 FROM debian:jessie-slim
 
+WORKDIR acme_dns_tiny
+
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
     python3-minimal python3-dnspython python3-requests \
     python3-coverage \
     && apt-get clean
+
+COPY . .
diff --git a/docker/stretch/Dockerfile b/docker/stretch/Dockerfile
index f562a560edaf698dd1c7f1c6b8eceea9b7bf5586..1572c8c00513c8d6fcf511ce9dbe54afd5fbe53c 100644
--- a/docker/stretch/Dockerfile
+++ b/docker/stretch/Dockerfile
@@ -1,7 +1,11 @@
 FROM debian:jessie-slim
 
+WORKDIR acme_dns_tiny
+
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
     python3-minimal python3-dnspython python3-requests \
     python3-coverage \
     && apt-get clean
+
+COPY . .