diff --git a/ci-scripts/docker/Dockerfile.unittest.ubuntu20 b/ci-scripts/docker/Dockerfile.unittest.ubuntu20
index 7e47988719..57bc7f3bef 100644
--- a/ci-scripts/docker/Dockerfile.unittest.ubuntu20
+++ b/ci-scripts/docker/Dockerfile.unittest.ubuntu20
@@ -27,6 +27,11 @@
 
 FROM ran-base:develop as ran-tests
 
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get upgrade --yes && \
+    DEBIAN_FRONTEND=noninteractive apt-get install --yes \
+        libgtest-dev
+
 RUN rm -Rf /oai-ran
 WORKDIR /oai-ran
 COPY . .