diff --git a/.github/workflows/regression-test-css.yml b/.github/workflows/regression-test-css.yml
index cbdc967d..2abb0942 100644
--- a/.github/workflows/regression-test-css.yml
+++ b/.github/workflows/regression-test-css.yml
@@ -49,7 +49,7 @@ jobs:
         sudo apt-get --only-upgrade install google-chrome-stable
         google-chrome --version
     - name: Setup npm packages
-      run: npm install --production
+      run: npm install --omit=dev
     - if: ${{ matrix.os == 'ubuntu-latest' }}
       name: RUNNING TEST - LINUX
       run: |
diff --git a/.github/workflows/regression-test-google-lighthouse-based.yml b/.github/workflows/regression-test-google-lighthouse-based.yml
index 9c69fb48..a4d9abd2 100644
--- a/.github/workflows/regression-test-google-lighthouse-based.yml
+++ b/.github/workflows/regression-test-google-lighthouse-based.yml
@@ -33,7 +33,7 @@ jobs:
       with:
         node-version: '20.x'
     - name: Setup npm packages
-      run: npm install --production
+      run: npm install --omit=dev
     - if: ${{ matrix.os == 'ubuntu-latest' }}
       name: RUNNING TEST - LINUX
       run: |
diff --git a/.github/workflows/regression-test-html.yml b/.github/workflows/regression-test-html.yml
index a89d7bb7..d9041061 100644
--- a/.github/workflows/regression-test-html.yml
+++ b/.github/workflows/regression-test-html.yml
@@ -49,7 +49,7 @@ jobs:
         sudo apt-get --only-upgrade install google-chrome-stable
         google-chrome --version
     - name: Setup npm packages
-      run: npm install --production
+      run: npm install --omit=dev
     - if: ${{ matrix.os == 'ubuntu-latest' }}
       name: RUNNING TEST - LINUX
       run: |
diff --git a/.github/workflows/regression-test-http.yml b/.github/workflows/regression-test-http.yml
index c2aaa9c3..1d6d229e 100644
--- a/.github/workflows/regression-test-http.yml
+++ b/.github/workflows/regression-test-http.yml
@@ -47,7 +47,7 @@ jobs:
         sudo apt-get --only-upgrade install google-chrome-stable
         google-chrome --version
     - name: Setup npm packages
-      run: npm install --production
+      run: npm install --omit=dev
     - if: ${{ matrix.os == 'ubuntu-latest' }}
       name: RUNNING TEST - LINUX
       run: |
diff --git a/.github/workflows/regression-test-pa11y.yml b/.github/workflows/regression-test-pa11y.yml
index 623147f7..b8b5eba5 100644
--- a/.github/workflows/regression-test-pa11y.yml
+++ b/.github/workflows/regression-test-pa11y.yml
@@ -34,7 +34,7 @@ jobs:
       with:
         node-version: '20.x'
     - name: Setup npm packages
-      run: npm install --production
+      run: npm install --omit=dev
     # Havn't yet been able to start Google Chrome in headless mode in pa11y since move to Chrome in Pa11y 5
     - if: ${{ matrix.os == 'ubuntu-20.04' }}
       name: RUNNING TEST - LINUX
diff --git a/.github/workflows/regression-test-sitespeed.yml b/.github/workflows/regression-test-sitespeed.yml
index 5bf02b17..424417da 100644
--- a/.github/workflows/regression-test-sitespeed.yml
+++ b/.github/workflows/regression-test-sitespeed.yml
@@ -63,7 +63,7 @@ jobs:
         sudo apt-get --only-upgrade install google-chrome-stable
         google-chrome --version
     - name: Setup npm packages
-      run: npm install --production
+      run: npm install --omit=dev
     - if: ${{ matrix.os == 'ubuntu-latest' }}
       name: RUNNING TEST - LINUX
       run: |
diff --git a/.github/workflows/regression-test-software.yml b/.github/workflows/regression-test-software.yml
index f0eda943..5e208f76 100644
--- a/.github/workflows/regression-test-software.yml
+++ b/.github/workflows/regression-test-software.yml
@@ -44,7 +44,7 @@ jobs:
         sudo apt-get --only-upgrade install google-chrome-stable
         google-chrome --version
     - name: Setup npm packages
-      run: npm install --production
+      run: npm install --omit=dev
     - if: ${{ matrix.os == 'ubuntu-latest' }}
       name: RUNNING TEST - LINUX
       run: |
diff --git a/.github/workflows/regression-test-tracking.yml b/.github/workflows/regression-test-tracking.yml
index 3c946cb0..c3b77cbf 100644
--- a/.github/workflows/regression-test-tracking.yml
+++ b/.github/workflows/regression-test-tracking.yml
@@ -99,7 +99,7 @@ jobs:
       name: Setup GeckoDriver (Used for Selenium)
       run: wget -q -O - https://github.com/mozilla/geckodriver/releases/download/v0.30.0/geckodriver-v0.30.0-linux64.tar.gz | tar -xvzf -
     - name: Setup npm packages
-      run: npm install --production
+      run: npm install --omit=dev
     - if: ${{ matrix.os == 'ubuntu-latest' }}
       name: RUNNING TEST - LINUX
       run: |
diff --git a/.github/workflows/regression-test-ylt.yml b/.github/workflows/regression-test-ylt.yml
index 95515846..10ab5586 100644
--- a/.github/workflows/regression-test-ylt.yml
+++ b/.github/workflows/regression-test-ylt.yml
@@ -39,7 +39,7 @@ jobs:
       run: sudo apt-get install libjpeg-dev libfontconfig
       shell: bash
     - name: Setup npm packages
-      run: npm install --production
+      run: npm install --omit=dev
     - if: ${{ matrix.os == 'ubuntu-latest' }}
       name: RUNNING TEST - LINUX
       run: |
diff --git a/.github/workflows/update-software.yml b/.github/workflows/update-software.yml
index 0f691341..3d78cf38 100644
--- a/.github/workflows/update-software.yml
+++ b/.github/workflows/update-software.yml
@@ -42,7 +42,7 @@ jobs:
         sudo apt-get --only-upgrade install google-chrome-stable
         google-chrome --version
     - name: Setup npm packages
-      run: npm install --production
+      run: npm install --omit=dev
     - name: Update USER_AGENT in our defaults/settings.json
       run: python update_software.py -b
     - name: Checkout advisory-database repo
diff --git a/Dockerfile b/Dockerfile
index 06ca47fd..6492bb78 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -62,7 +62,7 @@ RUN chown --recursive sitespeedio:sitespeedio /usr/src/runner
 # Run everything after as non-privileged user.
 USER sitespeedio
 
-RUN npm install --production
+RUN npm install --omit=dev
 
 RUN python3.12 -m pip install -r requirements.txt --break-system-packages && \
     python3.12 -m pip install --upgrade pip --break-system-packages && \
diff --git a/docs/getting-started-local.md b/docs/getting-started-local.md
index 1491b973..4491183b 100644
--- a/docs/getting-started-local.md
+++ b/docs/getting-started-local.md
@@ -13,7 +13,7 @@ it is also best/fastest when wanting to contribute with new tests, translations
 - Download and install Node.js (version 20.x)
 - Download and install Google Chrome browser
 * Download and install Mozilla Firefox
-- Install required npm packages by typing following and hit Enter: `npm install --production`
+- Install required npm packages by typing following and hit Enter: `npm install --omit=dev`
 - Validate that core functionality is working by typing following and hit Enter `python default.py -h`
 - If the output looks something like example in [options and arguments](getting-started.md#options-and-arguments) you have successfully setup the general parts of webperf-core.
 - Please look at/return to the [specific test](tests/README.md) you want to run to make sure it doesn't require more steps.
diff --git a/docs/tests/css.md b/docs/tests/css.md
index 8176c4c2..b4569304 100644
--- a/docs/tests/css.md
+++ b/docs/tests/css.md
@@ -53,7 +53,7 @@ Read more on the [general page for github actions](../getting-started-github-act
 
 * Download and install Node.js (version 20.x)
 * Download and install Google Chrome browser
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 * Set `sitespeed_use_docker = False` in your `config.py`
 
 ##### Windows Specific
diff --git a/docs/tests/google-lighthouse-based.md b/docs/tests/google-lighthouse-based.md
index eb39fa52..9a8f4fd5 100644
--- a/docs/tests/google-lighthouse-based.md
+++ b/docs/tests/google-lighthouse-based.md
@@ -35,7 +35,7 @@ Follow the instructions below depending on what you choose.
 Benefit of this option is that you can use it to test pre production urls like your AcceptanceTest environment.
 
 * Download and install Node.js (version 20.x)
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 
 ## Read more
 
diff --git a/docs/tests/html.md b/docs/tests/html.md
index 06e1c97c..bf737f07 100644
--- a/docs/tests/html.md
+++ b/docs/tests/html.md
@@ -43,7 +43,7 @@ Read more on the [general page for github actions](../getting-started-github-act
 
 * Download and install Node.js (version 20.x)
 * Download and install Google Chrome browser
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 * Set `sitespeed_use_docker = False` in your `config.py`
 
 ##### Windows Specific
diff --git a/docs/tests/http.md b/docs/tests/http.md
index 4265cc67..7d7e258d 100644
--- a/docs/tests/http.md
+++ b/docs/tests/http.md
@@ -71,7 +71,7 @@ Read more on the [general page for github actions](../getting-started-github-act
 * Download and install Node.js (version 20.x)
 * Download and install Google Chrome browser
 * Download and install Mozilla Firefox browser
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 * Set `sitespeed_use_docker = False` in your `config.py`
 
 ##### Windows Specific
diff --git a/docs/tests/pa11y.md b/docs/tests/pa11y.md
index 73c15fc9..f80be919 100644
--- a/docs/tests/pa11y.md
+++ b/docs/tests/pa11y.md
@@ -44,7 +44,7 @@ Read more on the [general page for github actions](../getting-started-github-act
 * Follow [general local setup steps for this repository](../getting-started-local.md)
 * Download and install Node.js (version 20.x)
 * Download and install Google Chrome browser
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 
 ## FAQ
 
diff --git a/docs/tests/sitespeed.md b/docs/tests/sitespeed.md
index 511315a4..5ecfe2e1 100644
--- a/docs/tests/sitespeed.md
+++ b/docs/tests/sitespeed.md
@@ -73,7 +73,7 @@ Read more on the [general page for github actions](../getting-started-github-act
 * Install ffmpeg `sudo apt install ffmpeg`
 * Download and install Node.js (version 20.x)
 * Download and install Google Chrome browser
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 * Set `sitespeed_use_docker = False` in your `config.py`
 
 (You can always see [GitHub Actions SiteSpeed](../../.github/workflows/regression-test-sitespeed.yml) for all steps required line by line)
@@ -86,7 +86,7 @@ Read more on the [general page for github actions](../getting-started-github-act
 * Download and Install ffmpeg `https://ffmpeg.org/download.html#build-windows`
 * Download and install Node.js (version 20.x)
 * Download and install Google Chrome browser
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 * Set `sitespeed_use_docker = False` in your `config.py`
 
 #### Using Docker image
diff --git a/docs/tests/software.md b/docs/tests/software.md
index 86e63884..53d242ee 100644
--- a/docs/tests/software.md
+++ b/docs/tests/software.md
@@ -140,7 +140,7 @@ TODO: Add links to blogs and articles showing how to remove info regarding what
 
 * Download and install Node.js (version 20.x)
 * Download and install Google Chrome browser
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 * Set `sitespeed_use_docker = False` in your `config.py`
 
 ##### Windows Specific
diff --git a/docs/tests/tracking.md b/docs/tests/tracking.md
index 93381387..e2d8a7ee 100644
--- a/docs/tests/tracking.md
+++ b/docs/tests/tracking.md
@@ -143,7 +143,7 @@ This section has not been written yet.
 * Download and install Node.js (version 20.x)
 * Download and install Google Chrome browser
 * Download and install Mozilla Firefox
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 * Set `sitespeed_use_docker = False` in your `config.py`
 
 ##### Windows Specific
diff --git a/docs/tests/yellowlab.md b/docs/tests/yellowlab.md
index 9410c31f..af16a79f 100644
--- a/docs/tests/yellowlab.md
+++ b/docs/tests/yellowlab.md
@@ -32,11 +32,11 @@ Read more on the [general page for github actions](../getting-started-github-act
 * Download and install Node.js (version 20.x)
 * Download and install node-gyp `npm install -g node-gyp`
 * Setup libjpeg and fontconfig `sudo apt-get install libjpeg-dev libfontconfig`
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 
 ##### On Windows:
 * Download and install Node.js (version 20.x)
-* Install NPM packages ( `npm install --production` )
+* Install NPM packages ( `npm install --omit=dev` )
 
 ## FAQ