diff --git a/coconut/command/command.py b/coconut/command/command.py
index dcdae0b12..9548f1ed3 100644
--- a/coconut/command/command.py
+++ b/coconut/command/command.py
@@ -266,7 +266,7 @@ def execute_args(self, args, interact=True, original_args=None):
             if args.site_install and args.site_uninstall:
                 raise CoconutException("cannot --site-install and --site-uninstall simultaneously")
             if args.incremental and not SUPPORTS_INCREMENTAL:
-                raise CoconutException("--incremental mode requires cPyparsing (run '{python} -m pip install --upgrade cPyparsing' to fix)".format(python=sys.executable))
+                raise CoconutException("--incremental mode not supported in current environment (try '{python} -m pip install --upgrade cPyparsing' to fix)".format(python=sys.executable))
             for and_args in getattr(args, "and") or []:
                 if len(and_args) > 2:
                     raise CoconutException(
diff --git a/coconut/constants.py b/coconut/constants.py
index c2ad6eea1..dc142f320 100644
--- a/coconut/constants.py
+++ b/coconut/constants.py
@@ -963,6 +963,7 @@ def get_path_env_var(env_var, default):
     "numpy": (
         ("numpy", "py<3;cpy"),
         ("numpy", "py34;py<39"),
+        ("numpy", "py39"),
         ("pandas", "py36"),
     ),
     "tests": (
diff --git a/coconut/tests/main_test.py b/coconut/tests/main_test.py
index edc424bc5..690bca953 100644
--- a/coconut/tests/main_test.py
+++ b/coconut/tests/main_test.py
@@ -940,7 +940,7 @@ def test_run_arg(self):
             def test_jobs_zero(self):
                 run(["--jobs", "0"])
 
-        if not PYPY:
+        if not PYPY and PY38:
             def test_incremental(self):
                 run(["--incremental"])
                 # includes "Error" because exceptions include the whole file