diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a52682a..37b71d3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,4 +13,4 @@ jobs:
         run: >-
           docker run -t --rm
           -v "$PWD:/yadm:ro"
-          yadm/testbed:2020-07-08
+          yadm/testbed:2020-12-21
diff --git a/Makefile b/Makefile
index fe3310e..15539cc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 PYTESTS = $(wildcard test/test_*.py)
-IMAGE = yadm/testbed:2020-07-08
+IMAGE = yadm/testbed:2020-12-21
 
 .PHONY: all
 all:
@@ -146,16 +146,16 @@ testenv:
 	@echo
 	python3 -m venv --clear testenv
 	testenv/bin/pip3 install --upgrade pip setuptools
-	testenv/bin/pip3 install --upgrade \
-		flake8==3.7.8 \
-		pylint==2.4.1 \
-		pytest==5.1.3 \
-		yamllint==1.17.0 \
-	;
+	testenv/bin/pip3 install --upgrade -r test/requirements.txt;
 	@echo
 	@echo 'To activate this test environment type:'
 	@echo '  source testenv/bin/activate'
 
+.PHONY: image
+image:
+	@docker build -f test/Dockerfile . -t "$(IMAGE)"
+
+
 .PHONY: man
 man:
 	@groff -man -Tascii ./yadm.1 | less
diff --git a/docker-compose.yml b/docker-compose.yml
index 60458d5..2247667 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,4 +4,4 @@ services:
   testbed:
     volumes:
       - .:/yadm:ro
-    image: yadm/testbed:2020-07-08
+    image: yadm/testbed:2020-12-21
diff --git a/Dockerfile b/test/Dockerfile
similarity index 73%
rename from Dockerfile
rename to test/Dockerfile
index f686108..7a1e684 100644
--- a/Dockerfile
+++ b/test/Dockerfile
@@ -12,6 +12,9 @@ ENV LANG='en_US.UTF-8' LANGUAGE='en_US:en' LC_ALL='en_US.UTF-8'
 # Convenience settings for the testbed's root account
 RUN echo 'set -o vi' >> /root/.bashrc
 
+# Create a flag to identify when running inside the yadm testbed
+RUN touch /.yadmtestbed
+
 # Install prerequisites
 RUN \
   apt-get update && \
@@ -24,25 +27,25 @@ RUN \
     make \
     man \
     python3-pip \
-    shellcheck=0.4.6-1 \
     vim \
-  ;
-RUN pip3 install \
-      envtpl \
-      j2cli \
-      flake8==3.7.8 \
-      pylint==2.4.1 \
-      pytest==5.1.3 \
-      yamllint==1.17.0 \
-    ;
+  && rm -rf /var/lib/apt/lists/*;
+
+ARG SC_VER=0.7.1
+RUN \
+  curl -fLo - \
+  https://github.com/koalaman/shellcheck/releases/download/v$SC_VER/shellcheck-v$SC_VER.linux.x86_64.tar.xz | \
+  tar -xJv && \
+  mv shellcheck-v$SC_VER/shellcheck /usr/bin && \
+  rm -rf shellcheck-v$SC_VER
+
+COPY test/requirements.txt /tmp/requirements.txt
+RUN pip3 install --upgrade pip setuptools
+RUN pip3 install --upgrade -r /tmp/requirements.txt
 
 RUN \
   curl https://raw.githubusercontent.com/jirutka/esh/v0.3.0/esh > /usr/local/bin/esh && \
   chmod +x /usr/local/bin/esh
 
-# Create a flag to identify when running inside the yadm testbed
-RUN touch /.yadmtestbed
-
 # /yadm will be the work directory for all tests
 # docker commands should mount the local yadm project as /yadm
 WORKDIR /yadm
diff --git a/test/conftest.py b/test/conftest.py
index 618e1ef..38228a1 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -25,25 +25,25 @@ def pytest_addoption(parser):
 @pytest.fixture(scope='session')
 def shellcheck_version():
     """Version of shellcheck supported"""
-    return '0.4.6'
+    return '0.7.1'
 
 
 @pytest.fixture(scope='session')
 def pylint_version():
     """Version of pylint supported"""
-    return '2.4.1'
+    return '2.6.0'
 
 
 @pytest.fixture(scope='session')
 def flake8_version():
     """Version of flake8 supported"""
-    return '3.7.8'
+    return '3.8.4'
 
 
 @pytest.fixture(scope='session')
 def yamllint_version():
     """Version of yamllint supported"""
-    return '1.17.0'
+    return '1.25.0'
 
 
 @pytest.fixture(scope='session')
diff --git a/test/requirements.txt b/test/requirements.txt
new file mode 100644
index 0000000..27ace6c
--- /dev/null
+++ b/test/requirements.txt
@@ -0,0 +1,6 @@
+envtpl
+flake8==3.8.4
+j2cli
+pylint==2.6.0
+pytest==6.1.2
+yamllint==1.25.0