diff --git a/tests/auc/Makefile.am b/tests/auc/Makefile.am
index b196dbc3..9d0f7263 100644
--- a/tests/auc/Makefile.am
+++ b/tests/auc/Makefile.am
@@ -2,12 +2,12 @@ SUBDIRS = gen_ts_55_205_test_sets
 
 AM_CPPFLAGS = \
 	$(all_includes) \
+	-I$(top_srcdir)/include \
 	$(NULL)
 
 AM_CFLAGS = \
 	-Wall \
 	-ggdb3 \
-	-I$(top_srcdir)/include \
 	$(LIBOSMOCORE_CFLAGS) \
 	$(LIBOSMOGSM_CFLAGS) \
 	$(NULL)
diff --git a/tests/db/Makefile.am b/tests/db/Makefile.am
index ece34d3f..b07460e3 100644
--- a/tests/db/Makefile.am
+++ b/tests/db/Makefile.am
@@ -1,7 +1,10 @@
-AM_CFLAGS = \
+AM_CPPFLAGS = \
 	$(all_includes) \
 	-I$(top_srcdir)/include \
 	-I$(top_builddir)/include \
+	$(NULL)
+
+AM_CFLAGS = \
 	-Wall \
 	-ggdb3 \
 	$(LIBOSMOCORE_CFLAGS) \
diff --git a/tests/gsup/Makefile.am b/tests/gsup/Makefile.am
index 9a10597a..04bc51a2 100644
--- a/tests/gsup/Makefile.am
+++ b/tests/gsup/Makefile.am
@@ -1,9 +1,9 @@
 AM_CPPFLAGS = \
 	$(all_includes) \
+	-I$(top_srcdir)/include \
 	$(NULL)
 
 AM_CFLAGS = \
-	-I$(top_srcdir)/include \
 	$(LIBOSMOCORE_CFLAGS) \
 	$(LIBOSMOGSM_CFLAGS) \
 	$(NULL)
diff --git a/tests/mslookup/Makefile.am b/tests/mslookup/Makefile.am
index 04778e84..5c53a023 100644
--- a/tests/mslookup/Makefile.am
+++ b/tests/mslookup/Makefile.am
@@ -1,11 +1,11 @@
 AM_CPPFLAGS = \
 	$(all_includes) \
+	-I$(top_srcdir)/include \
 	$(NULL)
 
 AM_CFLAGS = \
 	-Wall \
 	-ggdb3 \
-	-I$(top_srcdir)/include \
 	$(LIBOSMOCORE_CFLAGS) \
 	$(LIBOSMOGSM_CFLAGS) \
 	$(LIBOSMOABIS_CFLAGS) \