diff --git a/.github/workflows/mkosi.yml b/.github/workflows/mkosi.yml
index 5f14be6599..6ed7a48efa 100644
--- a/.github/workflows/mkosi.yml
+++ b/.github/workflows/mkosi.yml
@@ -161,6 +161,7 @@ jobs:
           UseSubvolumes=yes
           ToolsTreeDistribution=${{ matrix.distro }}
           ToolsTreeRelease=${{ matrix.release }}
+          WithTests=yes
 
           WorkspaceDirectory=$TMPDIR
           PackageCacheDirectory=$TMPDIR/cache
diff --git a/docs/HACKING.md b/docs/HACKING.md
index fab5ae07b9..431c1eb4af 100644
--- a/docs/HACKING.md
+++ b/docs/HACKING.md
@@ -36,12 +36,13 @@ or via your distribution's package manager. Note that systemd regularly adopts
 newer mkosi features that are not in an official release yet so there's a good
 chance that your distribution's packaged version of mkosi will be too old.
 
-Then, you can build and run systemd executables as follows:
+Then, you can build, run and test systemd executables as follows:
 
 ```sh
 $ mkosi -f sandbox -- meson setup build
 $ mkosi -f sandbox -- meson compile -C build
 $ mkosi -f sandbox -- build/systemctl --version
+$ mkosi -f sandbox -- meson test -C build          # Run the unit tests
 ```
 
 To build and boot an OS image with the latest systemd installed:
diff --git a/mkosi.conf b/mkosi.conf
index 954012ee0f..1ae273a5da 100644
--- a/mkosi.conf
+++ b/mkosi.conf
@@ -34,6 +34,7 @@ ToolsTree=default
 BuildDirectory=build/mkosi.builddir
 CacheDirectory=build/mkosi.cache
 Incremental=yes
+WithTests=no
 
 [Validation]
 SignExpectedPcr=yes
diff --git a/test/fmf/integration-tests/test.sh b/test/fmf/integration-tests/test.sh
index c7aeb06998..5c9f03c960 100755
--- a/test/fmf/integration-tests/test.sh
+++ b/test/fmf/integration-tests/test.sh
@@ -95,6 +95,7 @@ SandboxTrees=
         /etc/yum.repos.d/:/etc/yum.repos.d/
         /var/share/test-artifacts/:/var/share/test-artifacts/
 Environment=NO_BUILD=1
+WithTests=yes
 EOF
 
     cat /etc/dnf/dnf.conf