diff --git a/Dockerfile b/Dockerfile
index 1b35d5157..6b2a5865c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,10 @@ ARG BASE_DEBIAN_DISTRO=bookworm
 ARG GO_VERSION=1.24.5
 ARG XX_VERSION=1.6.1
 ARG GOVERSIONINFO_VERSION=v1.4.1
-ARG GOTESTSUM_VERSION=v1.12.0
+
+# GOTESTSUM_VERSION sets the version of gotestsum to install in the dev container.
+# It must be a valid tag in the https://github.com/gotestyourself/gotestsum repository.
+ARG GOTESTSUM_VERSION=v1.12.3
 
 # BUILDX_VERSION sets the version of buildx to use for the e2e tests.
 # It must be a tag in the docker.io/docker/buildx-bin image repository
diff --git a/dockerfiles/Dockerfile.dev b/dockerfiles/Dockerfile.dev
index 4b481f256..f60b11176 100644
--- a/dockerfiles/Dockerfile.dev
+++ b/dockerfiles/Dockerfile.dev
@@ -26,7 +26,9 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
     && gofumpt --version
 
 FROM golang AS gotestsum
-ARG GOTESTSUM_VERSION=v1.12.0
+# GOTESTSUM_VERSION sets the version of gotestsum to install in the dev container.
+# It must be a valid tag in the https://github.com/gotestyourself/gotestsum repository.
+ARG GOTESTSUM_VERSION=v1.12.3
 RUN --mount=type=cache,target=/root/.cache/go-build \
     --mount=type=cache,target=/go/pkg/mod \
     --mount=type=tmpfs,target=/go/src/ \