diff --git a/changes/bug29063 b/changes/bug29063
new file mode 100644
index 0000000000..8cbcbebc6e
--- /dev/null
+++ b/changes/bug29063
@@ -0,0 +1,2 @@
+  o Code simplification and refactoring (shell scripts):
+    - Fix issues shellcheck found in test_rebind.sh. Resolves issue 29063.
diff --git a/src/test/test_rebind.sh b/src/test/test_rebind.sh
index 498072de35..a8f07c7c1e 100755
--- a/src/test/test_rebind.sh
+++ b/src/test/test_rebind.sh
@@ -15,10 +15,15 @@ fi
 exitcode=0
 
 tmpdir=
-clean () { test -n "$tmpdir" && test -d "$tmpdir" && rm -rf "$tmpdir" || :; }
+clean () {
+  if [ -n "$tmpdir" ] && [ -d "$tmpdir" ]; then
+    rm -rf "$tmpdir"
+  fi
+}
+
 trap clean EXIT HUP INT TERM
 
-tmpdir="`mktemp -d -t tor_rebind_test.XXXXXX`"
+tmpdir="$(mktemp -d -t tor_rebind_test.XXXXXX)"
 if [ -z "$tmpdir" ]; then
   echo >&2 mktemp failed
   exit 2