diff --git a/sample_images/generate_images.sh b/sample_images/generate_images.sh
index e0b54ae..81a3296 100755
--- a/sample_images/generate_images.sh
+++ b/sample_images/generate_images.sh
@@ -186,14 +186,27 @@
 exit 0
 EOF
 
+  # An unlabeled postinstall bash program.
+  sudo tee "${mntdir}"/bin/self_check_default_context >/dev/null <<EOF
+#!/etc/../bin/sh
+echo "This is my context:"
+ls -lZ "\$0"
+ls -lZ "\$0" | grep -F ' u:object_r:postinstall_file:s0 ' || exit 5
+exit 0
+EOF
+
   # A postinstall bash program.
   sudo tee "${mntdir}"/bin/self_check_context >/dev/null <<EOF
 #!/etc/../bin/sh
 echo "This is my context:"
-ls -lZ "\$0" | grep -F ' u:object_r:postinstall_file:s0 ' || exit 5
+ls -lZ "\$0"
+ls -lZ "\$0" | grep -F ' u:object_r:postinstall_exec:s0 ' || exit 5
 exit 0
 EOF
 
+  # Give the test function the context we expect the postinstall-executable to have.
+  sudo setfattr -n security.selinux -v u:object_r:postinstall_exec:s0 "${mntdir}"/bin/self_check_context
+
   sudo tee "${mntdir}"/postinst >/dev/null <<EOF
 #!/etc/../bin/sh
 echo "postinst"
diff --git a/sample_images/sample_images.tar.bz2 b/sample_images/sample_images.tar.bz2
index 5c80a51..7965d8b 100644
--- a/sample_images/sample_images.tar.bz2
+++ b/sample_images/sample_images.tar.bz2
Binary files differ
diff --git a/sample_images/sample_payloads.tar.xz b/sample_images/sample_payloads.tar.xz
index d0bf6d9..eb589ba 100644
--- a/sample_images/sample_payloads.tar.xz
+++ b/sample_images/sample_payloads.tar.xz
Binary files differ