diff --git a/clap_builder/src/parser/parser.rs b/clap_builder/src/parser/parser.rs
index d820c63995b..81e47a004b5 100644
--- a/clap_builder/src/parser/parser.rs
+++ b/clap_builder/src/parser/parser.rs
@@ -54,7 +54,15 @@ impl<'cmd> Parser<'cmd> {
     ) -> ClapResult<()> {
         debug!("Parser::get_matches_with");
 
-        ok!(self.parse(matcher, raw_args, args_cursor));
+        ok!(self
+            .parse(matcher, raw_args, args_cursor)
+            .inspect_err(|_err| {
+                if self.cmd.is_ignore_errors_set() {
+                    #[cfg(feature = "env")]
+                    let _ = self.add_env(matcher);
+                    let _ = self.add_defaults(matcher);
+                }
+            }));
         ok!(self.resolve_pending(matcher));
 
         #[cfg(feature = "env")]
diff --git a/tests/builder/ignore_errors.rs b/tests/builder/ignore_errors.rs
index 850699a21b0..702b7746e63 100644
--- a/tests/builder/ignore_errors.rs
+++ b/tests/builder/ignore_errors.rs
@@ -113,7 +113,7 @@ fn unexpected_argument() {
         m.get_one::<String>("config").cloned(),
         Some("config file".to_owned())
     );
-    assert_eq!(m.get_one::<bool>("unset-flag").copied(), None);
+    assert_eq!(m.get_one::<bool>("unset-flag").copied(), Some(false));
 }
 
 #[test]