diff --git a/Makefile.am b/Makefile.am
index 1a3deca..16340fd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -20,7 +20,8 @@ EXTRA_DIST = \
 	lic/libtiff \
 	lic/regex \
 	lic/wxWindows \
-	lic/zlib
+	lic/zlib \
+	tests/samples
 
 DISTCLEANFILES = \
 	intltool-extract \
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 4df0f40..03beced 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -15,6 +15,7 @@ test_SOURCES = \
 AM_CPPFLAGS = \
 	-include config.h \
 	-I$(top_srcdir)/src \
+	-DSAMPLES_DIR=\"$(srcdir)/samples\" \
 	-pthread \
 	$(WX_CPPFLAGS)
 
diff --git a/tests/test-audio-info.cc b/tests/test-audio-info.cc
index 79670d7..e599cd5 100644
--- a/tests/test-audio-info.cc
+++ b/tests/test-audio-info.cc
@@ -35,7 +35,7 @@ struct FileInfo
 static void test_file(const std::string& name, const FileInfo& info)
 {
     Audio audio;
-    auto file = audio.open("samples/" + name);
+    auto file = audio.open(SAMPLES_DIR "/" + name);
     test("error", AudioError::OK, file->get_error());
     test("codec", info.codec_name, file->get_codec_name());
     test("bit rate", info.bit_rate, file->get_bit_rate());