diff --git a/scripts/test-live-acp-bind-docker.sh b/scripts/test-live-acp-bind-docker.sh
index 06d87742ae9..a8e145cb127 100644
--- a/scripts/test-live-acp-bind-docker.sh
+++ b/scripts/test-live-acp-bind-docker.sh
@@ -172,6 +172,32 @@ WRAP
     if [ ! -x "$NPM_CONFIG_PREFIX/bin/gemini" ]; then
       npm install -g @google/gemini-cli
     fi
+    if [ -n "${GEMINI_API_KEY:-}" ] || [ -n "${GOOGLE_API_KEY:-}" ]; then
+      gemini_auth_type="gemini-api-key"
+      if [ -z "${GEMINI_API_KEY:-}" ] && [ -n "${GOOGLE_API_KEY:-}" ]; then
+        gemini_auth_type="vertex-ai"
+        export GOOGLE_GENAI_USE_VERTEXAI="${GOOGLE_GENAI_USE_VERTEXAI:-true}"
+      fi
+      GEMINI_CLI_AUTH_TYPE="$gemini_auth_type" node <<'NODE'
+const fs = require("node:fs");
+const os = require("node:os");
+const path = require("node:path");
+
+const settingsPath = path.join(os.homedir(), ".gemini", "settings.json");
+let settings = {};
+try {
+  settings = JSON.parse(fs.readFileSync(settingsPath, "utf8"));
+} catch {}
+settings.security = settings.security && typeof settings.security === "object" ? settings.security : {};
+settings.security.auth =
+  settings.security.auth && typeof settings.security.auth === "object" ? settings.security.auth : {};
+settings.security.auth.selectedType = process.env.GEMINI_CLI_AUTH_TYPE;
+settings.security.auth.enforcedType = process.env.GEMINI_CLI_AUTH_TYPE;
+fs.mkdirSync(path.dirname(settingsPath), { recursive: true });
+fs.writeFileSync(settingsPath, `${JSON.stringify(settings, null, 2)}\n`);
+NODE
+      echo "Using Gemini CLI auth type $gemini_auth_type"
+    fi
     ;;
   opencode)
     if [ ! -x "$NPM_CONFIG_PREFIX/bin/opencode" ]; then