diff --git a/.pylintrc b/.pylintrc
index 78dfd299..6803cb0c 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -105,8 +105,7 @@ max-returns=11
 
 # Maximum number of statements in function / method body.
 # defaults to: max-statements=50
-# xen-bugtool:main() is currently at 376, but it has a dedicated pylint disable comment now:
-# max-statements=376
+max-statements=52
 
 [FORMAT]
 
diff --git a/tests/unit/test_load_plugins.py b/tests/unit/test_load_plugins.py
new file mode 100644
index 00000000..c859ece5
--- /dev/null
+++ b/tests/unit/test_load_plugins.py
@@ -0,0 +1,52 @@
+"""Regression tests for bugtool.load_plugins()"""
+
+
+def test_load_plugins(bugtool, dom0_template):
+    """Assert () returning arrays of the  in the dom0-template"""
+
+    # Use the plugins found in the dom0_template "/etc/xensource/bugtool":
+    bugtool.PLUGIN_DIR = dom0_template + "/etc/xensource/bugtool"
+    # Only process the xapi bugtool plugin:
+    bugtool.entries = ["xapi"]
+    # Reset the predefined caps and cap_sizes, so we can check the plugin code:
+    # bugtool.caps = {}
+    # bugtool.cap_sizes = {}
+    # Load the xapi plugin:
+    bugtool.load_plugins(just_capabilities=False)
+    # Assert the set of properties of the created xapi capability:
+    assert bugtool.caps["xapi"] == (
+        "xapi",
+        "yes",
+        -1,
+        16384,
+        -1,
+        60,
+        "text/plain",
+        True,
+        False,
+        9,
+    )
+    # Assert the size of the created xapi capability:
+    assert bugtool.cap_sizes["xapi"] == 0
+    print(bugtool.data)
+    # Assert the entries added to the bugtool.data dict:
+    assert bugtool.data == {
+        "ls -l /proc/sys/dev/tty": {
+            "cap": "xapi",
+            "cmd_args": ["ls", "-l", "/proc/sys/dev/tty"],
+            "filter": None,
+        },
+        "/proc/sys/dev/tty": {
+            "cap": "xapi",
+            "filename": "/proc/sys/dev/tty",
+        },
+        "/proc/sys/dev/tty/ldisc_autoload": {
+            "cap": "xapi",
+            "filename": "/proc/sys/dev/tty/ldisc_autoload",
+        },
+        "tty": {
+            "cap": "xapi",
+            "cmd_args": "ls /proc/sys/dev/tty",
+            "filter": None,
+        },
+    }
diff --git a/xen-bugtool b/xen-bugtool
index 119c91dd..a96cc938 100755
--- a/xen-bugtool
+++ b/xen-bugtool
@@ -518,7 +518,7 @@ def dir_list(cap, path_list, recursive = False):
         flags = '-lR'
 
     pl = []
-    map(lambda x: pl.extend(glob.glob(x)), path_list)
+    list(map(lambda x: pl.extend(glob.glob(x)), path_list))
 
     for p in pl:
         cmd_output(cap, [LS, flags, p])
@@ -526,7 +526,7 @@ def dir_list(cap, path_list, recursive = False):
 def file_output(cap, path_list):
     if cap in entries:
         pl = []
-        map(lambda x: pl.extend(glob.glob(x)), path_list)
+        list(map(lambda x: pl.extend(glob.glob(x)), path_list))
 
         for p in pl:
             try:
@@ -1594,6 +1594,8 @@ def load_plugins(just_capabilities = False):
         for node in nodelist:
             if node.nodeType == node.TEXT_NODE:
                 rc += node.data
+        if sys.version_info > (3, 0):
+            return rc
         return rc.encode()
 
     def getBoolAttr(el, attr, default = False):