diff --git a/Dockerfile b/Dockerfile
index 482d0f25..c1ab2345 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -212,7 +212,6 @@ ENV GITHUB_SHA=${GITHUB_SHA} \
     VALIDATE_KOTLIN=${VALIDATE_KOTLIN} \
     VALIDATE_POWERSHELL=${VALIDATE_POWERSHELL} \
     VALIDATE_ARM=${VALIDATE_ARM} \
-    ARM_TTK_VERSION=${ARM_TTK_VERSION} \
     VALIDATE_OPENAPI=${VALIDATE_OPENAPI} \
     VALIDATE_PROTOBUF=${VALIDATE_PROTOBUF} \
     ANSIBLE_DIRECTORY=${ANSIBLE_DIRECTORY} \