diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 00000000..87226211
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,2 @@
+[pytest]
+python_files = test*.py
diff --git a/src/diffpy/pdfgui/control/pdfguicontrol.py b/src/diffpy/pdfgui/control/pdfguicontrol.py
index 15632a0d..d3c07a84 100644
--- a/src/diffpy/pdfgui/control/pdfguicontrol.py
+++ b/src/diffpy/pdfgui/control/pdfguicontrol.py
@@ -93,7 +93,7 @@ def run(self):
 
     def startQueue(self):
         """start queue manager"""
-        self.queueManager.setDaemon(True)
+        self.queueManager.ddaemon = True
         self.queueManager.start()
 
     def checkQueue(self):
diff --git a/src/diffpy/pdfgui/gui/aboutdialog.py b/src/diffpy/pdfgui/gui/aboutdialog.py
index 51012e01..03de2ced 100644
--- a/src/diffpy/pdfgui/gui/aboutdialog.py
+++ b/src/diffpy/pdfgui/gui/aboutdialog.py
@@ -21,7 +21,7 @@
 import wx.lib.agw.hyperlink
 
 from diffpy.pdfgui.gui.pdfguiglobals import iconpath
-from diffpy.pdfgui.version import __date__, __version__
+from diffpy.pdfgui.version import __version__, __year__
 
 _acknowledgement = """\
 This software was developed by the Billinge-group as part of the Distributed
@@ -42,7 +42,7 @@
     computer programs for studying nanostructure in crystals,
     J. Phys.: Condens. Matter 19, 335219 (2007)."""
 
-_copyright = "(c) 2005-{year},".format(year=__date__[:4])
+_copyright = "(c) 2005-{year},".format(year=__year__)
 
 _homepage = "https://www.diffpy.org"
 
diff --git a/src/diffpy/pdfgui/gui/extendedplotframe.py b/src/diffpy/pdfgui/gui/extendedplotframe.py
index 297a7670..a1a052a8 100644
--- a/src/diffpy/pdfgui/gui/extendedplotframe.py
+++ b/src/diffpy/pdfgui/gui/extendedplotframe.py
@@ -183,8 +183,11 @@ def insertCurve(self, xData, yData, style):
         return:  internal reference to the newly added curve
         """
         stylestr, properties = self.__translateStyles(style)
-        curveRef = self.subplot.plot(xData, yData, stylestr, **properties)[0]
-        self.subplot.legend(**legendBoxProperties())
+        if stylestr == "":  # blank stylestring throws warning for duplicated information
+            curveRef = self.subplot.plot(xData, yData, **properties)[0]
+        else:
+            curveRef = self.subplot.plot(xData, yData, stylestr, **properties)[0]
+        self.subplot.legend([], **legendBoxProperties())  # add blank list argument to prevent warning
         try:
             self.datalims[curveRef] = (min(xData), max(xData), min(yData), max(yData))
         except ValueError:
@@ -314,7 +317,7 @@ def __translateStyles(self, style):
             # not 'points', so line properties are required as well
             lineStyle = lineStyleDict.get(style["line"], "-")  # prefer solid
             lineWidth = style["width"]
-            stylestr += lineStyle
+            # stylestr += lineStyle  # no need to add lineStyle to stylestr when in properties
             properties.update({"color": color, "linestyle": lineStyle, "linewidth": lineWidth})
 
         if "legend" in style:
diff --git a/src/diffpy/pdfgui/gui/pdfguiglobals.py b/src/diffpy/pdfgui/gui/pdfguiglobals.py
index 96f20538..fc5f5e57 100644
--- a/src/diffpy/pdfgui/gui/pdfguiglobals.py
+++ b/src/diffpy/pdfgui/gui/pdfguiglobals.py
@@ -17,7 +17,7 @@
 
 import os.path
 
-from pkg_resources import Requirement, resource_filename
+from importlib_resources import as_file, files
 
 from diffpy.pdfgui.gui import debugoptions
 
@@ -31,14 +31,15 @@
 isAltered = False
 
 # Resolve APPDATADIR base path to application data files.
-_mydir = os.path.abspath(resource_filename(__name__, ""))
-_upbasedir = os.path.normpath(_mydir + "/../../..")
-_development_mode = os.path.basename(_upbasedir) == "src" and os.path.isfile(
-    os.path.join(_upbasedir, "../setup.py")
-)
+with as_file(files(__name__)) as file:
+    _mydir = os.path.abspath(file)
+    _upbasedir = os.path.normpath(_mydir + "/../../..")
+    _development_mode = os.path.basename(_upbasedir) == "src" and os.path.isfile(
+        os.path.join(_upbasedir, "../setup.py")
+    )
 
 # Requirement must have egg-info.  Do not use in _development_mode.
-_req = Requirement.parse("diffpy.pdfgui")
+_req = "diffpy.pdfgui"
 
 # pavol
 # APPDATADIR = (os.path.dirname(_upbasedir) if _development_mode
@@ -47,9 +48,11 @@
 if _development_mode:
     APPDATADIR = os.path.dirname(_mydir)
 else:
-    APPDATADIR = os.path.join(resource_filename(_req, ""), "diffpy/pdfgui")
+    with as_file(files(_req)) as file:
+        APPDATADIR = os.path.join(file, "")
 
 APPDATADIR = os.path.abspath(APPDATADIR)
+print(APPDATADIR)
 
 # Location of the HTML manual
 docMainFile = os.path.join(APPDATADIR, "doc/manual/pdfgui.html")
diff --git a/src/diffpy/pdfgui/tests/__init__.py b/src/diffpy/pdfgui/tests/__init__.py
index 863e9949..a0a02efa 100644
--- a/src/diffpy/pdfgui/tests/__init__.py
+++ b/src/diffpy/pdfgui/tests/__init__.py
@@ -38,31 +38,32 @@ def testsuite(pattern=""):
     from itertools import chain
     from os.path import dirname
 
-    from pkg_resources import resource_filename
+    from importlib_resources import as_file, files
 
     loader = unittest.defaultTestLoader
-    thisdir = resource_filename(__name__, "")
-    depth = __name__.count(".") + 1
-    topdir = thisdir
-    for i in range(depth):
-        topdir = dirname(topdir)
-    suite_all = loader.discover(thisdir, top_level_dir=topdir)
-    # always filter the suite by pattern to test-cover the selection code.
-    suite = unittest.TestSuite()
-    rx = re.compile(pattern)
-    tsuites = list(chain.from_iterable(suite_all))
-    tsok = all(isinstance(ts, unittest.TestSuite) for ts in tsuites)
-    if not tsok:  # pragma: no cover
-        return suite_all
-    tcases = chain.from_iterable(tsuites)
-    for tc in tcases:
-        tcwords = tc.id().split(".")
-        shortname = ".".join(tcwords[-3:])
-        if rx.search(shortname):
-            suite.addTest(tc)
-    # verify all tests are found for an empty pattern.
-    assert pattern or suite_all.countTestCases() == suite.countTestCases()
-    return suite
+    ref = files(__name__)
+    with as_file(ref) as thisdir:
+        depth = __name__.count(".") + 1
+        topdir = thisdir
+        for i in range(depth):
+            topdir = dirname(topdir)
+        suite_all = loader.discover(thisdir, top_level_dir=topdir)
+        # always filter the suite by pattern to test-cover the selection code.
+        suite = unittest.TestSuite()
+        rx = re.compile(pattern)
+        tsuites = list(chain.from_iterable(suite_all))
+        tsok = all(isinstance(ts, unittest.TestSuite) for ts in tsuites)
+        if not tsok:  # pragma: no cover
+            return suite_all
+        tcases = chain.from_iterable(tsuites)
+        for tc in tcases:
+            tcwords = tc.id().split(".")
+            shortname = ".".join(tcwords[-3:])
+            if rx.search(shortname):
+                suite.addTest(tc)
+        # verify all tests are found for an empty pattern.
+        assert pattern or suite_all.countTestCases() == suite.countTestCases()
+        return suite
 
 
 def test():
diff --git a/src/diffpy/pdfgui/version.py b/src/diffpy/pdfgui/version.py
index c7eb817e..f05e9201 100644
--- a/src/diffpy/pdfgui/version.py
+++ b/src/diffpy/pdfgui/version.py
@@ -19,9 +19,15 @@
 #  We do not use the other three variables, but can be added back if needed.
 #  __all__ = ["__date__", "__git_commit__", "__timestamp__", "__version__"]
 
+# from importlib_resources import files, as_file
+import os
+import time
+
 # obtain version information
-from importlib.metadata import version
+from importlib.metadata import distribution, version
 
+# with as_file(distribution("diffpy.pdfgui")) as file:
+__year__ = time.ctime(os.path.getctime(distribution("diffpy.pdfgui")._path))[-4:]
 __version__ = version("diffpy.pdfgui")
 
 # End of file