diff --git a/dev/build.rs b/dev/build.rs
index f12ab6de8..10fccdf02 100644
--- a/dev/build.rs
+++ b/dev/build.rs
@@ -808,7 +808,11 @@ fn prepare_test_files() {
     let broken_dbg = data_dir.join("test-stable-addrs-dwarf-only-broken-altlink.dbg");
     dwz(
         &data_dir.join("test-stable-addrs.dwz"),
-        &[dbg.to_str().unwrap(), broken_dbg.to_str().unwrap()],
+        &[
+            "--relative",
+            dbg.to_str().unwrap(),
+            broken_dbg.to_str().unwrap(),
+        ],
     );
     let () = adjust_mtime(&dbg).unwrap();
     objcopy(
diff --git a/src/dwarf/debug_altlink.rs b/src/dwarf/debug_altlink.rs
index 175aef2d4..e65b8a50a 100644
--- a/src/dwarf/debug_altlink.rs
+++ b/src/dwarf/debug_altlink.rs
@@ -59,7 +59,6 @@ fn parse_debug_altlink_section_data(mut data: &[u8]) -> Result<Option<(&Path, Bu
 mod tests {
     use super::*;
 
-    use std::ffi::OsStr;
     use std::mem::size_of_val;
     use std::slice;
 
@@ -136,10 +135,7 @@ mod tests {
 
         let parser = ElfParser::open(elf.as_path()).unwrap();
         let (path, build_id) = read_debug_altlink(&parser).unwrap().unwrap();
-        assert_eq!(
-            path.file_name().unwrap(),
-            OsStr::new("test-stable-addrs.dwz")
-        );
+        assert_eq!(path, Path::new("test-stable-addrs.dwz"));
 
         let dbg = Path::new(&env!("CARGO_MANIFEST_DIR"))
             .join("data")