diff --git a/test/docker/task.dockerfile b/test/docker/task.dockerfile
index d858790..dee9603 100644
--- a/test/docker/task.dockerfile
+++ b/test/docker/task.dockerfile
@@ -28,7 +28,7 @@ ARG BRANCH
 
 FROM ubuntu:24.04 AS base
 
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update && \
     apt-get install -y \
@@ -43,9 +43,9 @@ RUN apt-get update && \
             uuid-dev
 
 # Setup language environment
-ENV LC_ALL en_US.UTF-8
-ENV LANG en_US.UTF-8
-ENV LANGUAGE en_US.UTF-8
+ENV LC_ALL=en_US.UTF-8
+ENV LANG=en_US.UTF-8
+ENV LANGUAGE=en_US.UTF-8
 
 # Setup Rust
 RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs > rustup.sh && \
@@ -53,12 +53,12 @@ RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs > rustup.sh && \
 
 # Checkout Taskwarrior
 WORKDIR /root
-# clone repo with submodels as we need corrosion
+# clone repo with all submodules, as we need 'corrosion'
 RUN git clone --recurse-submodules https://github.com/GothenburgBitFactory/taskwarrior.git code
 WORKDIR code
 RUN git checkout ${BRANCH}
 
-# remove libshared folder which is the submodel
+# remove libshared submodule folder
 RUN rm -rf src/libshared
 
 FROM base AS builder
diff --git a/test/docker/timew.dockerfile b/test/docker/timew.dockerfile
index e0bd5f6..185db3e 100644
--- a/test/docker/timew.dockerfile
+++ b/test/docker/timew.dockerfile
@@ -28,7 +28,7 @@ ARG BRANCH
 
 FROM ubuntu:24.04 AS base
 
-ENV DEBIAN_FRONTEND noninteractive
+ENV DEBIAN_FRONTEND=noninteractive
 
 RUN ( apt-get update && yes | unminimize ) && \
     apt-get install -y \
@@ -43,11 +43,11 @@ RUN ( apt-get update && yes | unminimize ) && \
             tzdata
 
 # Setup language environment
-ENV LC_ALL en_US.UTF-8
-ENV LANG en_US.UTF-8
-ENV LANGUAGE en_US.UTF-8
+ENV LC_ALL=en_US.UTF-8
+ENV LANG=en_US.UTF-8
+ENV LANGUAGE=en_US.UTF-8
 
-# Checkout Timewarrior
+# Checkout Timewarrior (without libshared submodule)
 WORKDIR /root
 RUN git clone https://github.com/GothenburgBitFactory/timewarrior.git code
 WORKDIR code