diff --git a/runtests.py b/runtests.py
index d684f86f..359273ef 100755
--- a/runtests.py
+++ b/runtests.py
@@ -70,18 +70,24 @@ astdatadir = ast_config.directories["astdatadir"] or '/var/lib/asterisk'
 if astdatadir[0] == os.path.sep:
      astdatadir = astdatadir[1:]
 
-pjproject_lib = os.path.join(os.getenv("AST_TEST_ROOT") or os.path.sep, astdatadir, "third-party/pjproject")
-if os.path.exists(pjproject_lib):
-    # runtests.py needs pjproject_lib for the dependency checks.
-    sys.path.append(pjproject_lib)
-    # And of course, the tests need it.
-    new_PYTHONPATH.append(pjproject_lib)
+pjproject_bin = os.path.join(os.getenv("AST_TEST_ROOT") or os.path.sep, astdatadir, "third-party/pjproject")
+if os.path.exists(pjproject_bin):
     new_SYSPATH = []
     if os.getenv("PATH"):
         new_SYSPATH.append(os.getenv("PATH"))
-    new_SYSPATH.append(pjproject_lib)
+    new_SYSPATH.append(pjproject_bin)
     os.environ['PATH'] = os.pathsep.join(new_SYSPATH)
 
+    if sys.version_info[0] == 2:
+        pjproject_lib = os.path.join(pjproject_bin, 'py2')
+    else:
+        pjproject_lib = os.path.join(pjproject_bin, 'py3')
+    if os.path.exists(pjproject_lib):
+        # runtests.py needs pjproject_lib for the dependency checks.
+        sys.path.append(pjproject_lib)
+        # And of course, the tests need it.
+        new_PYTHONPATH.append(pjproject_lib)
+
 # If True, abandon the current running TestRun. Used by SIGTERM.
 abandon_test = False