diff --git a/testing/Dockerfile b/testing/Dockerfile
index 227d38307e..dad46be829 100644
--- a/testing/Dockerfile
+++ b/testing/Dockerfile
@@ -9,17 +9,14 @@ RUN curl -LOks https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}/ter
     rm terraform_${TERRAFORM_VERSION}_linux_amd64.zip
 
 # Install conftest
-ENV DEFAULT_CONFTEST_VERSION=0.27.0
+ENV CONFTEST_VERSION=0.27.0
+RUN curl -LOs https://github.com/open-policy-agent/conftest/releases/download/v${CONFTEST_VERSION}/conftest_${CONFTEST_VERSION}_Linux_x86_64.tar.gz && \
+    curl -LOs https://github.com/open-policy-agent/conftest/releases/download/v${CONFTEST_VERSION}/checksums.txt && \
+    sed -n "/conftest_${CONFTEST_VERSION}_Linux_x86_64.tar.gz/p" checksums.txt | sha256sum -c && \
+    sudo mkdir -p /usr/local/bin/cft/versions/${CONFTEST_VERSION} && \
+    sudo tar -C  /usr/local/bin/cft/versions/${CONFTEST_VERSION} -xzf conftest_${CONFTEST_VERSION}_Linux_x86_64.tar.gz && \
+    sudo ln -s /usr/local/bin/cft/versions/${CONFTEST_VERSION}/conftest /usr/local/bin/conftest${CONFTEST_VERSION} && \
+    rm conftest_${CONFTEST_VERSION}_Linux_x86_64.tar.gz && \
+    rm checksums.txt
 
-RUN AVAILABLE_CONFTEST_VERSIONS="${DEFAULT_CONFTEST_VERSION}" && \
-    for VERSION in ${AVAILABLE_CONFTEST_VERSIONS}; do \
-        curl -LOs https://github.com/open-policy-agent/conftest/releases/download/v${VERSION}/conftest_${VERSION}_Linux_x86_64.tar.gz && \
-        curl -LOs https://github.com/open-policy-agent/conftest/releases/download/v${VERSION}/checksums.txt && \
-        sed -n "/conftest_${VERSION}_Linux_x86_64.tar.gz/p" checksums.txt | sha256sum -c && \
-        sudo mkdir -p /usr/local/bin/cft/versions/${VERSION} && \
-        sudo tar -C  /usr/local/bin/cft/versions/${VERSION} -xzf conftest_${VERSION}_Linux_x86_64.tar.gz && \
-        sudo ln -s /usr/local/bin/cft/versions/${VERSION}/conftest /usr/local/bin/conftest${VERSION} && \
-        rm conftest_${VERSION}_Linux_x86_64.tar.gz && \
-        rm checksums.txt; \
-    done
 RUN go get golang.org/x/tools/cmd/goimports