--- a/src/constants.rs	Wed Jul 30 18:00:14 2025 -0400
+++ b/src/constants.rs	Wed Jul 30 18:02:36 2025 -0400
@@ -467,7 +467,7 @@
     }
 
     #[test]
-    #[cfg(pam_impl = "Sun")]
+    #[cfg(feature = "sun-ext")]
     fn test_flags_sun() {
         assert_eq!(
             AuthtokFlags::NO_AUTHTOK_CHECK,

--- a/testharness/tests/end2end.rs	Wed Jul 30 18:00:14 2025 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,53 +0,0 @@
-#![cfg(feature = "test-install")]
-
-use std::any::Any;
-use std::convert::Infallible;
-use std::error::Error;
-use std::io;
-use std::panic::UnwindSafe;
-use std::path::{Path, PathBuf};
-use std::{fs, panic};
-
-const PAM_CONFIG: &str = "\
-auth required pam_testharness.so
-account required pam_testharness.so
-password required pam_testharness.so
-session required pam_testharness.so
-";
-const PAM_CONFIG_PATH: &str = "/etc/pam.d/testharness";
-const PAM_MODULE_PATH: &str = "/lib/security/pam_testharness.so";
-
-#[derive(Debug, thiserror::Error)]
-enum TestError {
-    #[error("error in test harness: {0}")]
-    HarnessError(#[from] io::Error),
-    #[error("panic in test: {0:?}")]
-    Panic(Box<dyn Any + Send>),
-    #[error(transparent)]
-    TestError(anyhow::Error),
-}
-
-#[test]
-fn test_auth_only() -> Result<(), TestError> {
-    harness(|| Ok::<(), Infallible>(()))
-}
-
-fn harness<E: Error + Send + Sync + 'static>(
-    test: impl Fn() -> Result<(), E> + UnwindSafe,
-) -> Result<(), TestError> {
-    let dylib_path = test_cdylib::build_current_project();
-    let module_path = Path::new(PAM_MODULE_PATH);
-    let config_path = Path::new(PAM_CONFIG_PATH);
-    let parent = module_path.parent().unwrap();
-    fs::create_dir_all(parent)?;
-    fs::copy(dylib_path, module_path)?;
-    fs::write(config_path, PAM_CONFIG)?;
-    panic::catch_unwind(test)
-        .map_err(TestError::Panic)?
-        .map_err(|e| TestError::TestError(e.into()))?;
-    fs::remove_file(module_path)?;
-    fs::remove_file(config_path)?;
-    // If the /lib/security directory can't be removed, that's OK.
-    let _ = fs::remove_dir(parent);
-    Ok(())
-}