diff --git a/Dockerfile-slim b/Dockerfile-slim
index 99496d7b3..232fb65d8 100644
--- a/Dockerfile-slim
+++ b/Dockerfile-slim
@@ -2,11 +2,11 @@ FROM node:20.9.0-bookworm-slim
 
 ARG TARGETPLATFORM=linux/amd64
 
-ENV SITESPEED_IO_BROWSERTIME__DOCKER true
-ENV SITESPEED_IO_BROWSERTIME__VIDEO false
-ENV SITESPEED_IO_BROWSERTIME__BROWSER firefox
-ENV SITESPEED_IO_BROWSERTIME__VISUAL_METRICS false
-ENV SITESPEED_IO_BROWSERTIME__HEADLESS true
+ENV SITESPEED_IO_BROWSERTIME__DOCKER=true
+ENV SITESPEED_IO_BROWSERTIME__VIDEO=false
+ENV SITESPEED_IO_BROWSERTIME__BROWSER=firefox
+ENV SITESPEED_IO_BROWSERTIME__VISUAL_METRICS=false
+ENV SITESPEED_IO_BROWSERTIME__HEADLESS=true
 
 ENV PATH="/usr/local/bin:${PATH}"
 
@@ -22,7 +22,8 @@ RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
 COPY . /usr/src/app
 COPY tools/postinstall.js /usr/src/app/tools/postinstall.js
-RUN CHROMEDRIVER_SKIP_DOWNLOAD=true EGDEDRIVER_SKIP_DOWNLOAD=true npm install --production && npm cache clean --force && npm uninstall npm -g
+RUN CHROMEDRIVER_SKIP_DOWNLOAD=true EGDEDRIVER_SKIP_DOWNLOAD=true npm install --production && npm cache clean --force && npm uninstall npm npx -g
+
 WORKDIR /usr/src/app
 COPY docker/scripts/start-slim.sh /start.sh