diff --git a/src/find/matchers/mod.rs b/src/find/matchers/mod.rs
index 20b51c1..9c8889d 100644
--- a/src/find/matchers/mod.rs
+++ b/src/find/matchers/mod.rs
@@ -481,7 +481,7 @@ fn build_matcher_tree(
                 config.depth_first = true;
                 None
             }
-            "-xdev" => {
+            "-mount" | "-xdev" => {
                 // TODO add warning if it appears after actual testing criterion
                 config.same_file_system = true;
                 None
diff --git a/src/find/matchers/regex.rs b/src/find/matchers/regex.rs
index b29e3e5..240d849 100644
--- a/src/find/matchers/regex.rs
+++ b/src/find/matchers/regex.rs
@@ -67,6 +67,8 @@ impl FromStr for RegexType {
             "grep" => Ok(Self::Grep),
             "posix-basic" => Ok(Self::PosixBasic),
             "posix-extended" => Ok(Self::PosixExtended),
+            // ed and sed are the same as posix-basic
+            "ed" | "sed" => Ok(Self::PosixBasic),
             _ => Err(ParseRegexTypeError(s.to_owned())),
         }
     }
diff --git a/tests/find_cmd_tests.rs b/tests/find_cmd_tests.rs
index c12e776..145a1bb 100644
--- a/tests/find_cmd_tests.rs
+++ b/tests/find_cmd_tests.rs
@@ -190,6 +190,34 @@ fn regex_types() {
         .success()
         .stderr(predicate::str::is_empty())
         .stdout(predicate::str::contains("teeest"));
+
+    Command::cargo_bin("find")
+        .expect("found binary")
+        .args(&[
+            &temp_dir_path,
+            "-regextype",
+            "ed",
+            "-regex",
+            &fix_up_regex_slashes(r".*/te\{1,3\}st"),
+        ])
+        .assert()
+        .success()
+        .stderr(predicate::str::is_empty())
+        .stdout(predicate::str::contains("teeest"));
+
+    Command::cargo_bin("find")
+        .expect("found binary")
+        .args(&[
+            &temp_dir_path,
+            "-regextype",
+            "sed",
+            "-regex",
+            &fix_up_regex_slashes(r".*/te\{1,3\}st"),
+        ])
+        .assert()
+        .success()
+        .stderr(predicate::str::is_empty())
+        .stdout(predicate::str::contains("teeest"));
 }
 
 #[test]
@@ -412,3 +440,26 @@ fn find_links() {
         .stderr(predicate::str::is_empty())
         .stdout(predicate::str::contains("abbbc"));
 }
+
+#[serial(working_dir)]
+#[test]
+fn find_mount_xdev() {
+    // Make sure that -mount/-xdev doesn't prune unexpectedly.
+    // TODO: Test with a mount point in the search.
+
+    Command::cargo_bin("find")
+        .expect("found binary")
+        .args(&["test_data", "-mount"])
+        .assert()
+        .success()
+        .stderr(predicate::str::is_empty())
+        .stdout(predicate::str::contains("abbbc"));
+
+    Command::cargo_bin("find")
+        .expect("found binary")
+        .args(&["test_data", "-xdev"])
+        .assert()
+        .success()
+        .stderr(predicate::str::is_empty())
+        .stdout(predicate::str::contains("abbbc"));
+}