diff --git a/Dockerfile.test b/Dockerfile.test
index 2897f3e..72e01d5 100644
--- a/Dockerfile.test
+++ b/Dockerfile.test
@@ -8,7 +8,7 @@ WORKDIR /build
 RUN wget https://gitlab.com/-/project/6808260/uploads/094ce726ce3c6cf8c14560f1e31aaea0/akku-1.1.0.amd64-linux.tar.xz \
     && tar -xf akku-1.1.0.amd64-linux.tar.xz \
     && mv akku-1.1.0.amd64-linux akku
-RUN git clone https://github.com/ashinn/chibi-scheme.git --depth=1
+RUN git clone https://github.com/ashinn/chibi-scheme.git --depth=2
 RUN git clone https://codeberg.org/retropikzel/compile-scheme.git --depth=2
 RUN git clone https://github.com/srfi-explorations/r7rs-srfi.git --branch=retropikzel-fixes --depth=3
 WORKDIR /build/chibi-scheme