diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index f74f80c42b6db..76ec9313aad24 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -131,6 +131,7 @@ jobs:
   steps:
   - template: ci/checkout-template.yml
   - template: ci/install-package-dependencies.yml
+  - bash: util/prep-bazel-airgapped-build.sh
   - bash: ci/scripts/test-airgapped-build.sh
 
 - job: slow_lints
diff --git a/ci/scripts/test-airgapped-build.sh b/ci/scripts/test-airgapped-build.sh
index 7604c288ac5d5..fbf52c4dec551 100755
--- a/ci/scripts/test-airgapped-build.sh
+++ b/ci/scripts/test-airgapped-build.sh
@@ -5,8 +5,11 @@
 
 set -ex
 
-# Prefetch bazel airgapped dependencies.
-util/prep-bazel-airgapped-build.sh -f
+# Prefetch bazel airgapped dependencies if not already done.
+if [ ! -d bazel-airgapped ]; then
+  echo "Airgapped environment not found, preparing..." >&2
+  util/prep-bazel-airgapped-build.sh -f
+fi
 
 # Remove the airgapped network namespace.
 remove_airgapped_netns() {