diff --git a/backend/Dockerfile.test-rust b/backend/Dockerfile.test-rust
index b01ecc7..f17da91 100644
--- a/backend/Dockerfile.test-rust
+++ b/backend/Dockerfile.test-rust
@@ -21,12 +21,21 @@ RUN cargo chef cook --release --recipe-path recipe.json
 FROM base AS test-build
 COPY --from=deps /usr/local/cargo /usr/local/cargo
 COPY --from=deps /usr/local/rustup /usr/local/rustup
-COPY --from=deps /app/target /app/target
+# Copy only release artifacts to save space
+COPY --from=deps /app/target/release /app/target/release
 COPY . .
+# Clean up incremental compilation artifacts before test build
+RUN rm -rf /app/target/debug/incremental
 RUN cargo test --workspace --locked --no-run
+# Clean up after test build to save space
+RUN rm -rf /app/target/debug/incremental /app/target/debug/build /app/target/debug/deps
 
 # Runner: minimal runtime for test execution
 FROM base AS runner
-COPY --from=test-build /app /app
+# Copy only necessary artifacts for test execution
+COPY --from=test-build /app/target /app/target
+COPY --from=test-build /app/Cargo.toml /app/Cargo.toml
+COPY --from=test-build /app/Cargo.lock /app/Cargo.lock
+COPY --from=test-build /app/crates /app/crates
 WORKDIR /app
 CMD ["cargo", "test", "--workspace", "--locked", "--", "--test-threads=1"]
\ No newline at end of file