diff --git a/infra/k8s/argo/gpu-test-pipeline-template.yaml b/infra/k8s/argo/gpu-test-pipeline-template.yaml
index 8653870ef..c9f9c10e0 100644
--- a/infra/k8s/argo/gpu-test-pipeline-template.yaml
+++ b/infra/k8s/argo/gpu-test-pipeline-template.yaml
@@ -208,6 +208,9 @@ spec:
             export PATH="${CARGO_HOME}/bin:${PATH}"
             export CUDA_COMPUTE_CAP={{workflow.parameters.cuda-compute-cap}}
 
+            # --- Clean stale test binaries (PVC incremental cache) ---
+            cargo clean -p ml -p ml-core -p ml-dqn -p ml-ppo 2>/dev/null || true
+
             # --- PTX cache invalidation ---
             # Purge stale cached PTX if any CUDA kernel source changed since last run.
             bash scripts/ptx-cache-invalidate.sh "${CARGO_TARGET_DIR}/.ptx_cache"