diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 2b1f76b433..f2e79f284d 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -8,6 +8,11 @@ ARG PNPM_VERSION=11.5.0
 ENV PNPM_HOME=/home/node/.local/share/pnpm
 ENV PATH=${PNPM_HOME}:${PATH}
 
+# Install Chromium for Karma/ChromeHeadless test execution inside the container.
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends chromium \
+    && rm -rf /var/lib/apt/lists/*
+
 # Configure Corepack-managed pnpm globally at image build time.
 RUN corepack enable \
     && corepack prepare pnpm@${PNPM_VERSION} --activate \
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index ddf3d36092..f26986a391 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -47,7 +47,8 @@
     "CI": "true",
     "NODE_ENV": "development",
     "NO_UPDATE_NOTIFIER": "1",
-    "PNPM_STORE_DIR": "/home/node/.pnpm-store"
+    "PNPM_STORE_DIR": "/home/node/.pnpm-store",
+    "CHROME_BIN": "/usr/bin/chromium"
   },
 
   "mounts": ["source=alfresco-ng2-pnpm-store,target=/home/node/.pnpm-store,type=volume"],
diff --git a/docs/dev-containers.md b/docs/dev-containers.md
index ef570b30e3..e31f8d4044 100644
--- a/docs/dev-containers.md
+++ b/docs/dev-containers.md
@@ -23,6 +23,19 @@ Typical day-to-day actions:
 - Reopen in container after dependency or toolchain updates
 - Keep local Docker Desktop running before opening the container
 
+## Running Nx Targets From the Workspace
+
+From the repository root (inside the container terminal), run Nx targets with the package manager wrapper.
+
+Common examples:
+
+- `pn nx test <project>`
+- `pn nx build <project>`
+
+You can replace `<project>` with any workspace project name, for example `core`, `content-services`, or `process-services-cloud`.
+
+Tip: to discover available projects and targets, run `pn nx show projects` and inspect each project's `project.json` (or workspace configuration).
+
 ## Git Operations and Signing
 
 You can use Git inside the container, outside the container, or split responsibilities for better key safety.
diff --git a/lib/core/karma.conf.js b/lib/core/karma.conf.js
index 024a216bb3..de58727e26 100644
--- a/lib/core/karma.conf.js
+++ b/lib/core/karma.conf.js
@@ -22,7 +22,7 @@ module.exports = function (config) {
             { pattern: 'lib/core/src/lib/viewer/assets/fake-test-file.txt', included: false, served: true, watched: false },
             { pattern: 'lib/core/src/lib/viewer/assets/fake-test-video.mp4', included: false, served: true, watched: false },
             {
-                pattern: 'lib/core//viewer/assets/fake-test-password-file.pdf',
+                pattern: 'lib/core/src/lib/viewer/assets/fake-test-password-file.pdf',
                 included: false,
                 served: true,
                 watched: false