diff --git a/robotpy_installer/_pipstub.py b/robotpy_installer/_pipstub.py
index 3a78d51..0ae039c 100644
--- a/robotpy_installer/_pipstub.py
+++ b/robotpy_installer/_pipstub.py
@@ -12,33 +12,42 @@
 import os
 import sys
 
-# TODO: better detection needed to ensure we only run this on systemcore
-#       but this is fine for now?
-if sysconfig.get_platform() == "linux-aarch64":
-    try:
-        import pip._vendor.packaging.tags as tags
+_ROBOTPY_PYTHON_PLATFORM = "linux_systemcore"
+_ROBOTPY_PYTHON_VERSION_TUPLE_FULL = (3, 14, 3)
+_ROBOTPY_MANYLINUX_MIN = 17
+_ROBOTPY_MANYLINUX_MAX = 38
 
-        def platform_tags():
-            for i in reversed(range(17, 38)):
-                yield f"manylinux_2_{i}_aarch64"
+if __name__ == "__main__":
 
-            yield "linux_systemcore"
-            yield "linux_aarch64"
+    # TODO: better detection needed to ensure we only run this on systemcore
+    #       but this is fine for now?
+    if sysconfig.get_platform() == "linux-aarch64":
+        try:
+            import pip._vendor.packaging.tags as tags
 
-        tags.platform_tags = platform_tags
+            def platform_tags():
+                for i in reversed(
+                    range(_ROBOTPY_MANYLINUX_MIN, _ROBOTPY_MANYLINUX_MAX + 1)
+                ):
+                    yield f"manylinux_2_{i}_aarch64"
 
-    except ImportError:
-        pass
+                yield _ROBOTPY_PYTHON_PLATFORM
+                yield "linux_aarch64"
 
+            tags.platform_tags = platform_tags
+
+        except ImportError:
+            pass
 
-if __name__ == "__main__":
     # Setup environment for what the SystemCore python would have
     # -> strictly speaking we only care about platform.machine as that's what
     #    we're using in robotpy-meta, but the rest for completeness
-    sysconfig.get_platform = lambda: "linux-systemcore"
+    sysconfig.get_platform = lambda: _ROBOTPY_PYTHON_PLATFORM.replace("_", "-")
     platform.machine = lambda: "systemcore"
     platform.python_implementation = lambda: "CPython"
     platform.system = lambda: "Linux"
-    platform.python_version = lambda: "3.14.0"
+    platform.python_version = lambda: ".".join(
+        map(str, _ROBOTPY_PYTHON_VERSION_TUPLE_FULL)
+    )
 
     runpy.run_module("pip", run_name="__main__")
diff --git a/robotpy_installer/installer.py b/robotpy_installer/installer.py
index 3567b53..90d5865 100755
--- a/robotpy_installer/installer.py
+++ b/robotpy_installer/installer.py
@@ -36,7 +36,8 @@
 ]
 
 _ROBOTPY_PYTHON_PLATFORM = "linux_systemcore"
-_ROBOTPY_PYTHON_VERSION_TUPLE = (3, 14)
+_ROBOTPY_PYTHON_VERSION_TUPLE_FULL = (3, 14, 3)
+_ROBOTPY_PYTHON_VERSION_TUPLE = _ROBOTPY_PYTHON_VERSION_TUPLE_FULL[:2]
 _ROBOTPY_PYTHON_VERSION_NUM = "".join(map(str, _ROBOTPY_PYTHON_VERSION_TUPLE))
 _ROBOTPY_PYTHON_VERSION = f"python{_ROBOTPY_PYTHON_VERSION_NUM}"
 
diff --git a/robotpy_installer/pypackages.py b/robotpy_installer/pypackages.py
index 3fefa0f..a54b9c7 100644
--- a/robotpy_installer/pypackages.py
+++ b/robotpy_installer/pypackages.py
@@ -250,14 +250,22 @@ def robot_env() -> Env:
     """
     For use with ``packaging.marker.Marker.evaluate``
     """
+    from .installer import (
+        _ROBOTPY_PYTHON_VERSION_TUPLE,
+        _ROBOTPY_PYTHON_VERSION_TUPLE_FULL,
+    )
+
+    python_version = ".".join(map(str, _ROBOTPY_PYTHON_VERSION_TUPLE))
+    python_full_version = ".".join(map(str, _ROBOTPY_PYTHON_VERSION_TUPLE_FULL))
+
     return {
         "implementation_name": "cpython",
-        "implementation_version": "3.13.5",
+        "implementation_version": python_full_version,
         "os_name": "posix",
         "platform_machine": "systemcore",
         "platform_python_implementation": "CPython",
         "platform_system": "Linux",
-        "python_full_version": "3.13.0",
-        "python_version": "3.13",
+        "python_full_version": python_full_version,
+        "python_version": python_version,
         "sys_platform": "linux",
     }
diff --git a/tests/test_pypackages.py b/tests/test_pypackages.py
new file mode 100644
index 0000000..e92c9b8
--- /dev/null
+++ b/tests/test_pypackages.py
@@ -0,0 +1,37 @@
+from robotpy_installer import _pipstub
+from robotpy_installer.installer import (
+    _ROBOTPY_MANYLINUX_MAX,
+    _ROBOTPY_MANYLINUX_MIN,
+    _ROBOTPY_PYTHON_PLATFORM,
+    _ROBOTPY_PYTHON_VERSION_TUPLE,
+    _ROBOTPY_PYTHON_VERSION_TUPLE_FULL,
+    _PYTHON_PKG,
+)
+from robotpy_installer.pypackages import robot_env
+
+
+def test_robot_env_matches_robotpy_python_version_tuple():
+    robotpy_python_version = ".".join(map(str, _ROBOTPY_PYTHON_VERSION_TUPLE))
+    robotpy_python_full_version = ".".join(map(str, _ROBOTPY_PYTHON_VERSION_TUPLE_FULL))
+
+    env = robot_env()
+
+    assert env["python_version"] == robotpy_python_version
+    assert env["python_full_version"] == robotpy_python_full_version
+    assert env["implementation_version"] == robotpy_python_full_version
+
+
+def test_python_pkg_uses_robotpy_python_full_version():
+    robotpy_python_full_version = ".".join(map(str, _ROBOTPY_PYTHON_VERSION_TUPLE_FULL))
+
+    assert f"/cpython-{robotpy_python_full_version}+" in _PYTHON_PKG
+
+
+def test_pipstub_matches_installer_robot_python_constants():
+    assert _pipstub._ROBOTPY_PYTHON_PLATFORM == _ROBOTPY_PYTHON_PLATFORM
+    assert (
+        _pipstub._ROBOTPY_PYTHON_VERSION_TUPLE_FULL
+        == _ROBOTPY_PYTHON_VERSION_TUPLE_FULL
+    )
+    assert _pipstub._ROBOTPY_MANYLINUX_MIN == _ROBOTPY_MANYLINUX_MIN
+    assert _pipstub._ROBOTPY_MANYLINUX_MAX == _ROBOTPY_MANYLINUX_MAX