diff --git a/poky/meta/classes/testimage.bbclass b/poky/meta/classes/testimage.bbclass
index a76e773..9980b3f 100644
--- a/poky/meta/classes/testimage.bbclass
+++ b/poky/meta/classes/testimage.bbclass
@@ -235,9 +235,10 @@
 
     tdname = "%s.testdata.json" % image_name
     try:
-        td = json.load(open(tdname, "r"))
-    except (FileNotFoundError) as err:
-         bb.fatal('File %s Not Found. Have you built the image with INHERIT+="testimage" in the conf/local.conf?' % tdname)
+        with open(tdname, "r") as f:
+            td = json.load(f)
+    except FileNotFoundError as err:
+        bb.fatal('File %s not found (%s).\nHave you built the image with INHERIT += "testimage" in the conf/local.conf?' % (tdname, err))
 
     # Some variables need to be updates (mostly paths) with the
     # ones of the current environment because some tests require them.
@@ -316,10 +317,6 @@
     if d.getVar("TESTIMAGE_BOOT_PATTERNS"):
         target_kwargs['boot_patterns'] = get_testimage_boot_patterns(d)
 
-    # TODO: Currently BBPATH is needed for custom loading of targets.
-    # It would be better to find these modules using instrospection.
-    target_kwargs['target_modules_path'] = d.getVar('BBPATH')
-
     # hardware controlled targets might need further access
     target_kwargs['powercontrol_cmd'] = d.getVar("TEST_POWERCONTROL_CMD") or None
     target_kwargs['powercontrol_extra_args'] = d.getVar("TEST_POWERCONTROL_EXTRA_ARGS") or ""