diff --git a/lib/spack/spack/test/data/directory_search/lib/a/liba.so b/lib/spack/spack/test/data/directory_search/lib/a/liba.so
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/lib/spack/spack/test/data/directory_search/lib/a/libd.so b/lib/spack/spack/test/data/directory_search/lib/a/libd.so
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/lib/spack/spack/test/data/directory_search/lib/b/libb.so b/lib/spack/spack/test/data/directory_search/lib/b/libb.so
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/lib/spack/spack/test/data/directory_search/lib64/c/libc.so b/lib/spack/spack/test/data/directory_search/lib64/c/libc.so
new file mode 100644
index 00000000000..e69de29bb2d