diff --git a/qtpy/cli.py b/qtpy/cli.py
index 0901bfd3..2fb57716 100644
--- a/qtpy/cli.py
+++ b/qtpy/cli.py
@@ -41,14 +41,18 @@ def generate_pyright_config_json():
     """Generate Pyright config to be used in `pyrightconfig.json`."""
     apis_active = get_api_status()
 
-    return json.dumps({ "defineConstant": {name.upper(): is_active for name, is_active in apis_active.items()}})
+    return json.dumps({
+        "defineConstant": {name.upper(): is_active for name, is_active in apis_active.items()}
+    })
 
 
 def generate_pyright_config_toml():
     """Generate a Pyright config to be used in `pyproject.toml`."""
     apis_active = get_api_status()
 
-    return "[tool.pyright.defineConstant]\n" + "\n".join(f"{name.upper()} = {is_active}" for name, is_active in apis_active.items())
+    return "[tool.pyright.defineConstant]\n" + "\n".join(
+        f"{name.upper()} = {str(is_active).lower()}" for name, is_active in apis_active.items()
+    )
 
 
 def print_mypy_args():
diff --git a/qtpy/tests/test_cli.py b/qtpy/tests/test_cli.py
index 6b0f0381..6b3efe3f 100644
--- a/qtpy/tests/test_cli.py
+++ b/qtpy/tests/test_cli.py
@@ -2,6 +2,7 @@
 
 import subprocess
 import sys
+import textwrap
 
 import pytest
 
@@ -75,3 +76,64 @@ def test_cli_mypy_args():
         assert False, 'No valid API to test'
 
     assert output.stdout.strip() == expected.strip()
+
+def test_cli_pyright_config():
+    output = subprocess.run(
+        [sys.executable, '-m', 'qtpy', 'pyright-config'],
+        capture_output=True,
+        check=True,
+        encoding='utf-8',
+    )
+
+    if qtpy.PYQT5:
+        expected = textwrap.dedent("""
+            pyrightconfig.json:
+            {"defineConstant": {"PYQT5": true, "PYSIDE2": false, "PYQT6": false, "PYSIDE6": false}}
+
+            pyproject.toml:
+            [tool.pyright.defineConstant]
+            PYQT5 = true
+            PYSIDE2 = false
+            PYQT6 = false
+            PYSIDE6 = false
+        """)
+    elif qtpy.PYSIDE2:
+        expected = textwrap.dedent("""
+            pyrightconfig.json:
+            {"defineConstant": {"PYQT5": false, "PYSIDE2": true, "PYQT6": false, "PYSIDE6": false}}
+
+            pyproject.toml:
+            [tool.pyright.defineConstant]
+            PYQT5 = false
+            PYSIDE2 = true
+            PYQT6 = false
+            PYSIDE6 = false
+        """)
+    elif qtpy.PYQT6:
+        expected = textwrap.dedent("""
+            pyrightconfig.json:
+            {"defineConstant": {"PYQT5": false, "PYSIDE2": false, "PYQT6": true, "PYSIDE6": false}}
+
+            pyproject.toml:
+            [tool.pyright.defineConstant]
+            PYQT5 = false
+            PYSIDE2 = false
+            PYQT6 = true
+            PYSIDE6 = false
+        """)
+    elif qtpy.PYSIDE6:
+        expected = textwrap.dedent("""
+            pyrightconfig.json:
+            {"defineConstant": {"PYQT5": false, "PYSIDE2": false, "PYQT6": false, "PYSIDE6": true}}
+
+            pyproject.toml:
+            [tool.pyright.defineConstant]
+            PYQT5 = false
+            PYSIDE2 = false
+            PYQT6 = false
+            PYSIDE6 = true
+        """)
+    else:
+        assert False, 'No valid API to test'
+
+    assert output.stdout.strip() == expected.strip()