diff --git a/tests/containers.py b/tests/containers.py
index 53324152500333f3bfb091b277af4a24efee256c..e011a1d5896431784be3895c1d0b4390ceb0680a 100755
--- a/tests/containers.py
+++ b/tests/containers.py
@@ -144,6 +144,35 @@ class TestContainers(BaseTest):
         cls.pv_dir = os.path.join(cls.tmpdir.name, 'pressure-vessel')
         os.makedirs(cls.pv_dir, exist_ok=True)
 
+        for var, plural in (
+            ('STEAM_COMPAT_APP_LIBRARY_PATH', False),
+            ('STEAM_COMPAT_APP_LIBRARY_PATHS', True),
+            ('STEAM_COMPAT_CLIENT_INSTALL_PATH', False),
+            ('STEAM_COMPAT_DATA_PATH', False),
+            ('STEAM_COMPAT_INSTALL_PATH', False),
+            ('STEAM_COMPAT_LIBRARY_PATHS', True),
+            ('STEAM_COMPAT_MOUNT_PATHS', True),
+            ('STEAM_COMPAT_MOUNTS', True),
+            ('STEAM_COMPAT_SHADER_PATH', False),
+            ('STEAM_COMPAT_TOOL_PATH', False),
+            ('STEAM_COMPAT_TOOL_PATHS', True),
+        ):
+            paths = []
+
+            if plural:
+                names = [var + '_n1', var + '_n2']
+            else:
+                # Use an inconvenient name with colon and space
+                # to check that we handle those correctly
+                names = [var + ': .d']
+
+            for name in names:
+                path = os.path.join(cls.tmpdir.name, name)
+                os.makedirs(path, exist_ok=True)
+                paths.append(path)
+
+            os.environ[var] = ':'.join(paths)
+
         if 'PRESSURE_VESSEL_UNINSTALLED' in os.environ:
             os.makedirs(os.path.join(cls.pv_dir, 'bin'))
 
@@ -521,11 +550,35 @@ class TestContainers(BaseTest):
                     )
                     self.assertEqual(completed.returncode, 0)
 
-            bwrap_arguments = bwrap_temp_file.read().decode().split("\0")
+            bwrap_arguments = bwrap_temp_file.read().decode()
             if locales:
-                self.assertIn("--generate-locales", bwrap_arguments)
+                self.assertIn("\0--generate-locales\0", bwrap_arguments)
             else:
-                self.assertNotIn("--generate-locales", bwrap_arguments)
+                self.assertNotIn("\0--generate-locales\0", bwrap_arguments)
+
+            if only_prepare:
+                for var, plural in (
+                    ('STEAM_COMPAT_APP_LIBRARY_PATH', False),
+                    ('STEAM_COMPAT_APP_LIBRARY_PATHS', True),
+                    ('STEAM_COMPAT_CLIENT_INSTALL_PATH', False),
+                    ('STEAM_COMPAT_INSTALL_PATH', False),
+                    ('STEAM_COMPAT_LIBRARY_PATHS', True),
+                    ('STEAM_COMPAT_MOUNT_PATHS', True),
+                    ('STEAM_COMPAT_MOUNTS', True),
+                    ('STEAM_COMPAT_SHADER_PATH', False),
+                    ('STEAM_COMPAT_TOOL_PATH', False),
+                    ('STEAM_COMPAT_TOOL_PATHS', True),
+                ):
+                    if plural:
+                        paths = os.environ[var].split(':')
+                    else:
+                        paths = [os.environ[var]]
+
+                    for path in paths:
+                        self.assertIn(
+                            "\0--bind\0{}\0{}".format(path, path),
+                            bwrap_arguments,
+                        )
 
             bwrap_temp_file.close()
 
diff --git a/tests/inside-runtime.py b/tests/inside-runtime.py
index a283ade914e756c26a733aa208edb9c8dd857457..cb83c29d2f6078341fef762a529f584acb0ec09f 100755
--- a/tests/inside-runtime.py
+++ b/tests/inside-runtime.py
@@ -9,6 +9,7 @@ import errno
 import json
 import logging
 import os
+import re
 import shlex
 import subprocess
 import sys
@@ -627,6 +628,41 @@ class TestInsideRuntime(BaseTest):
 
                 self.assertEqual(raised.exception.errno, errno.EROFS)
 
+    def test_imported(self) -> None:
+        mount_points = set()    # type: typing.Set[str]
+
+        with open('/proc/self/mountinfo') as mountinfo:
+            for line in mountinfo:
+                _, _, _, _, mount_point, *_ = re.split(r'[ \t]', line)
+
+                mount_point = re.sub(
+                    r'\\([0-7][0-7][0-7])',
+                    lambda m: chr(int(m.group(1), 8)),
+                    mount_point,
+                )
+                mount_points.add(mount_point)
+
+        for var, plural in (
+            ('STEAM_COMPAT_APP_LIBRARY_PATH', False),
+            ('STEAM_COMPAT_APP_LIBRARY_PATHS', True),
+            ('STEAM_COMPAT_CLIENT_INSTALL_PATH', False),
+            ('STEAM_COMPAT_DATA_PATH', False),
+            ('STEAM_COMPAT_INSTALL_PATH', False),
+            ('STEAM_COMPAT_LIBRARY_PATHS', True),
+            ('STEAM_COMPAT_MOUNT_PATHS', True),
+            ('STEAM_COMPAT_MOUNTS', True),
+            ('STEAM_COMPAT_SHADER_PATH', False),
+            ('STEAM_COMPAT_TOOL_PATH', False),
+            ('STEAM_COMPAT_TOOL_PATHS', True),
+        ):
+            if plural:
+                paths = os.environ[var].split(':')
+            else:
+                paths = [os.environ[var]]
+
+            for path in paths:
+                self.assertIn(path, mount_points)
+
 
 if __name__ == '__main__':
     assert sys.version_info >= (3, 5), 'Python 3.5+ is required'