diff --git a/README.md b/README.md
index acea67f..ed326c0 100644
--- a/README.md
+++ b/README.md
@@ -251,7 +251,7 @@ In particular, it uses a special program called `GRoot`, a small and portable
 version of
 [arch-chroot](https://wiki.archlinux.org/index.php/Chroot)
 wrapper, that allows to bind mount directories specified by the user, such as
-`/proc`, `/sys`, `/dev`, `/tmp` and `$HOME`, before
+`/proc`, `/sys`, `/dev`, `/tmp`, `/run/user/<id>` and `$HOME`, before
 executing any programs inside the JuNest sandbox. In case the mounting will not
 work, JuNest is even providing the possibility to run the environment directly via
 the pure `chroot` command.
diff --git a/tests/unit-tests/test-chroot.sh b/tests/unit-tests/test-chroot.sh
index f634b5b..703004d 100755
--- a/tests/unit-tests/test-chroot.sh
+++ b/tests/unit-tests/test-chroot.sh
@@ -41,22 +41,22 @@ function init_mocks() {
 
 function test_run_env_as_groot_cmd(){
     assertCommandSuccess run_env_as_groot "" "" "false" pwd
-    assertEquals "chroot_cmd -b $HOME -b /tmp -b /proc -b /sys -b /dev $JUNEST_HOME /bin/sh --login -c pwd" "$(cat "$STDOUTF")"
+    assertEquals "chroot_cmd -b /run/user/$(id -u) -b $HOME -b /tmp -b /proc -b /sys -b /dev $JUNEST_HOME /bin/sh --login -c pwd" "$(cat "$STDOUTF")"
 }
 
 function test_run_env_as_groot_no_cmd(){
     assertCommandSuccess run_env_as_groot "" "" "false" ""
-    assertEquals "chroot_cmd -b $HOME -b /tmp -b /proc -b /sys -b /dev $JUNEST_HOME /bin/sh --login" "$(cat "$STDOUTF")"
+    assertEquals "chroot_cmd -b /run/user/$(id -u) -b $HOME -b /tmp -b /proc -b /sys -b /dev $JUNEST_HOME /bin/sh --login" "$(cat "$STDOUTF")"
 }
 
 function test_run_env_as_groot_with_backend_command(){
     assertCommandSuccess run_env_as_groot "mychroot" "" "false" ""
-    assertEquals "mychroot -b $HOME -b /tmp -b /proc -b /sys -b /dev $JUNEST_HOME /bin/sh --login" "$(cat "$STDOUTF")"
+    assertEquals "mychroot -b /run/user/$(id -u) -b $HOME -b /tmp -b /proc -b /sys -b /dev $JUNEST_HOME /bin/sh --login" "$(cat "$STDOUTF")"
 }
 
 function test_run_env_as_groot_no_copy(){
     assertCommandSuccess run_env_as_groot "" "" "true" pwd
-    assertEquals "chroot_cmd -b $HOME -b /tmp -b /proc -b /sys -b /dev $JUNEST_HOME /bin/sh --login -c pwd" "$(cat "$STDOUTF")"
+    assertEquals "chroot_cmd -b /run/user/$(id -u) -b $HOME -b /tmp -b /proc -b /sys -b /dev $JUNEST_HOME /bin/sh --login -c pwd" "$(cat "$STDOUTF")"
 
     [[ ! -e ${JUNEST_HOME}/etc/hosts ]]
     assertEquals 0 $?
@@ -76,7 +76,7 @@ function test_run_env_as_groot_nested_env(){
 
 function test_run_env_as_groot_cmd_with_backend_args(){
     assertCommandSuccess run_env_as_groot "" "-n -b /home/blah" "false" pwd
-    assertEquals "chroot_cmd -b $HOME -b /tmp -b /proc -b /sys -b /dev -n -b /home/blah $JUNEST_HOME /bin/sh --login -c pwd" "$(cat "$STDOUTF")"
+    assertEquals "chroot_cmd -b /run/user/$(id -u) -b $HOME -b /tmp -b /proc -b /sys -b /dev -n -b /home/blah $JUNEST_HOME /bin/sh --login -c pwd" "$(cat "$STDOUTF")"
 }
 
 function test_run_env_as_chroot_cmd(){
diff --git a/tests/unit-tests/test-proot.sh b/tests/unit-tests/test-proot.sh
index 2217150..dfc7498 100755
--- a/tests/unit-tests/test-proot.sh
+++ b/tests/unit-tests/test-proot.sh
@@ -55,11 +55,11 @@ function test_run_env_as_proot_user(){
         echo $*
     }
     assertCommandSuccess run_env_as_proot_user "" "-k 3.10" "false" "/usr/bin/mkdir" "-v" "/newdir2"
-    assertEquals "-b $HOME -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
+    assertEquals "-b /run/user/$(id -u) -b $HOME -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
 
     SH=("/usr/bin/echo")
     assertCommandSuccess run_env_as_proot_user "" "-k 3.10" "false"
-    assertEquals "-b $HOME -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10" "$(cat "$STDOUTF")"
+    assertEquals "-b /run/user/$(id -u) -b $HOME -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10" "$(cat "$STDOUTF")"
 
     _test_copy_common_files
     _test_copy_remaining_files
@@ -72,11 +72,11 @@ function test_run_env_as_proot_user_with_backend_command(){
         echo $*
     }
     assertCommandSuccess run_env_as_proot_user "myproot" "-k 3.10" "false" "/usr/bin/mkdir" "-v" "/newdir2"
-    assertEquals "myproot -b $HOME -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
+    assertEquals "myproot -b /run/user/$(id -u) -b $HOME -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
 
     SH=("/usr/bin/echo")
     assertCommandSuccess run_env_as_proot_user "myproot" "-k 3.10" "false"
-    assertEquals "myproot -b $HOME -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10" "$(cat "$STDOUTF")"
+    assertEquals "myproot -b /run/user/$(id -u) -b $HOME -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10" "$(cat "$STDOUTF")"
 
     _test_copy_common_files
     _test_copy_remaining_files
@@ -89,7 +89,7 @@ function test_run_env_as_proot_user_no_copy(){
         echo $*
     }
     assertCommandSuccess run_env_as_proot_user "" "-k 3.10" "true" "/usr/bin/mkdir" "-v" "/newdir2"
-    assertEquals "-b $HOME -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
+    assertEquals "-b /run/user/$(id -u) -b $HOME -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
 
     [[ ! -e ${JUNEST_HOME}/etc/hosts ]]
     assertEquals 0 $?
@@ -126,11 +126,11 @@ function test_run_env_as_proot_fakeroot(){
         echo $*
     }
     assertCommandSuccess run_env_as_proot_fakeroot "" "-k 3.10" "false" "/usr/bin/mkdir" "-v" "/newdir2"
-    assertEquals "-0 -b ${HOME} -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
+    assertEquals "-0 -b /run/user/$(id -u) -b ${HOME} -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
 
     SH=("/usr/bin/echo")
     assertCommandSuccess run_env_as_proot_fakeroot "" "-k 3.10" "false"
-    assertEquals "-0 -b ${HOME} -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10" "$(cat "$STDOUTF")"
+    assertEquals "-0 -b /run/user/$(id -u) -b ${HOME} -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10" "$(cat "$STDOUTF")"
 
     _test_copy_common_files
 }
@@ -142,12 +142,12 @@ function test_run_env_as_proot_fakeroot_with_backend_command(){
         echo $*
     }
     assertCommandSuccess run_env_as_proot_fakeroot "myproot" "-k 3.10" "false" "/usr/bin/mkdir" "-v" "/newdir2"
-    assertEquals "myproot -0 -b ${HOME} -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
+    assertEquals "myproot -0 -b /run/user/$(id -u) -b ${HOME} -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
 
     # shellcheck disable=SC2034
     SH=("/usr/bin/echo")
     assertCommandSuccess run_env_as_proot_fakeroot "myproot" "-k 3.10" "false"
-    assertEquals "myproot -0 -b ${HOME} -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10" "$(cat "$STDOUTF")"
+    assertEquals "myproot -0 -b /run/user/$(id -u) -b ${HOME} -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10" "$(cat "$STDOUTF")"
 
     _test_copy_common_files
 }
@@ -165,7 +165,7 @@ function test_run_env_with_quotes(){
         echo $*
     }
     assertCommandSuccess run_env_as_proot_user "" "-k 3.10" "false" "bash" "-c" "/usr/bin/mkdir -v /newdir2"
-    assertEquals "-b ${HOME} -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 bash -c /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
+    assertEquals "-b /run/user/$(id -u) -b ${HOME} -b /tmp -b /proc -b /sys -b /dev -r ${JUNEST_HOME} -k 3.10 bash -c /usr/bin/mkdir -v /newdir2" "$(cat "$STDOUTF")"
 }
 
 function test_run_env_with_proot_args(){
diff --git a/tests/utils/shunit2 b/tests/utils/shunit2
index d6e7503..e4c719c 100644
--- a/tests/utils/shunit2
+++ b/tests/utils/shunit2
@@ -987,7 +987,7 @@ _shunit_extractTestFunctions()
   # extract the lines with test function names, strip of anything besides the
   # function name, and output everything on a single line.
   _shunit_regex_='^[ 	]*(function )*test[A-Za-z0-9_]* *\(\)'
-  egrep "${_shunit_regex_}" "${_shunit_script_}" \
+  grep -E "${_shunit_regex_}" "${_shunit_script_}" \
   |sed 's/^[^A-Za-z0-9_]*//;s/^function //;s/\([A-Za-z0-9_]*\).*/\1/g' \
   |xargs