diff --git a/.github/workflows/create-release.yml b/.github/workflows/create-release.yml
index 3daf5d0..489a373 100644
--- a/.github/workflows/create-release.yml
+++ b/.github/workflows/create-release.yml
@@ -35,7 +35,6 @@ jobs:
       run: ./scripts/integration.sh
       env:
         GIT_TOKEN: ${{ github.token }}
-        CNB_BUILDER_IMAGE: ${{ secrets.CNB_BUILDER_IMAGE }}
 
   release:
     name: Release
diff --git a/.github/workflows/test-pull-request.yml b/.github/workflows/test-pull-request.yml
index 1638554..2e6df34 100644
--- a/.github/workflows/test-pull-request.yml
+++ b/.github/workflows/test-pull-request.yml
@@ -35,7 +35,6 @@ jobs:
       run: ./scripts/integration.sh
       env:
         GIT_TOKEN: ${{ github.token }}
-        CNB_BUILDER_IMAGE: ${{ secrets.CNB_BUILDER_IMAGE }}
 
   approve:
     name: Auto Approve
diff --git a/scripts/integration.sh b/scripts/integration.sh
index f4bc977..4db053a 100755
--- a/scripts/integration.sh
+++ b/scripts/integration.sh
@@ -40,20 +40,30 @@ function tools::install() {
 }
 
 function images::pull() {
+    local builder
+
+    if [[ -f "${BUILDPACKDIR}/integration.json" ]]; then
+      builder="$(jq -r .builder "${BUILDPACKDIR}/integration.json")"
+    fi
+
+    if [[ "${builder}" == "null" || -z "${builder}" ]]; then
+      builder="index.docker.io/paketobuildpacks/builder:base"
+    fi
+
     util::print::title "Pulling builder image..."
-    docker pull "${CNB_BUILDER_IMAGE:=index.docker.io/paketobuildpacks/builder:base}"
+    docker pull "${builder}"
 
     util::print::title "Setting default pack builder image..."
-    pack set-default-builder "${CNB_BUILDER_IMAGE}"
+    pack set-default-builder "${builder}"
 
     local run_image lifecycle_image
     run_image="$(
-      docker inspect "${CNB_BUILDER_IMAGE}" \
+      docker inspect "${builder}" \
         | jq -r '.[0].Config.Labels."io.buildpacks.builder.metadata"' \
         | jq -r '.stack.runImage.image'
     )"
     lifecycle_image="index.docker.io/buildpacksio/lifecycle:$(
-      docker inspect "${CNB_BUILDER_IMAGE}" \
+      docker inspect "${builder}" \
         | jq -r '.[0].Config.Labels."io.buildpacks.builder.metadata"' \
         | jq -r '.lifecycle.version'
     )"