diff --git a/tests/xbps/libxbps/shell/conf_files_test.sh b/tests/xbps/libxbps/shell/conf_files_test.sh
index 4e6b3396..be023550 100644
--- a/tests/xbps/libxbps/shell/conf_files_test.sh
+++ b/tests/xbps/libxbps/shell/conf_files_test.sh
@@ -18,7 +18,7 @@ tc1_body() {
 	rm -rf pkg_a
 	xbps-rindex -a *.xbps
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -y a
+	xbps-install -C null.conf -r rootdir --repository=$PWD -y a
 	atf_check_equal $? 0
 
 	sed -e 's,fooblah,blahfoo,' -i rootdir/cf1.conf
@@ -29,7 +29,7 @@ tc1_body() {
 	xbps-rindex -a *.xbps
 	rm -rf pkg_a
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -yu
+	xbps-install -C null.conf -r rootdir --repository=$PWD -yu
 	atf_check_equal $? 0
 	result="$(cat rootdir/cf1.conf)"
 	rval=1
@@ -58,7 +58,7 @@ tc2_body() {
 	rm -rf pkg_a
 	xbps-rindex -a *.xbps
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -y a
+	xbps-install -C null.conf -r rootdir --repository=$PWD -y a
 	atf_check_equal $? 0
 
 	sed -e 's,fooblah,blahfoo,' -i rootdir/cf1.conf
@@ -71,7 +71,7 @@ tc2_body() {
 	xbps-rindex -a *.xbps
 	rm -rf pkg_a
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -yu
+	xbps-install -C null.conf -r rootdir --repository=$PWD -yu
 	atf_check_equal $? 0
 	result="$(cat rootdir/cf1.conf)"
 	rval=1
@@ -105,7 +105,7 @@ tc3_body() {
 	rm -rf pkg_a
 	xbps-rindex -a *.xbps
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -y a
+	xbps-install -C null.conf -r rootdir --repository=$PWD -y a
 	atf_check_equal $? 0
 
 	sed -e 's,fooblah,blahfoo,' -i rootdir/cf1.conf
@@ -118,7 +118,7 @@ tc3_body() {
 	xbps-rindex -a *.xbps
 	rm -rf pkg_a
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -yu
+	xbps-install -C null.conf -r rootdir --repository=$PWD -yu
 	atf_check_equal $? 0
 	result="$(cat rootdir/cf1.conf)"
 	rval=1
diff --git a/tests/xbps/libxbps/shell/issue18_test.sh b/tests/xbps/libxbps/shell/issue18_test.sh
index b5cb526d..cd8c6b3d 100644
--- a/tests/xbps/libxbps/shell/issue18_test.sh
+++ b/tests/xbps/libxbps/shell/issue18_test.sh
@@ -22,7 +22,7 @@ issue18_body() {
 	atf_check_equal $? 0
 	xbps-rindex -a *.xbps
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -y A B
+	xbps-install -C null.conf -r rootdir --repository=$PWD -y A B
 	atf_check_equal $? 0
 
 	xbps-create -A noarch -n A-0.2_1 -s "pkg A" --conflicts "B<0.1_2" pkg_A
@@ -31,7 +31,7 @@ issue18_body() {
 	atf_check_equal $? 0
 	xbps-rindex -a *.xbps
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -yu
+	xbps-install -C null.conf -r rootdir --repository=$PWD -yu
 	atf_check_equal $? 0
 }
 
diff --git a/tests/xbps/libxbps/shell/issue20_test.sh b/tests/xbps/libxbps/shell/issue20_test.sh
index 7cd7b4e4..987eae4e 100644
--- a/tests/xbps/libxbps/shell/issue20_test.sh
+++ b/tests/xbps/libxbps/shell/issue20_test.sh
@@ -31,7 +31,7 @@ issue20_body() {
 	rm -rf pkg_a
 	xbps-rindex -a *.xbps
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -y a
+	xbps-install -C null.conf -r rootdir --repository=$PWD -y a
 	atf_check_equal $? 0
 
 	mkdir pkg_a
@@ -42,7 +42,7 @@ issue20_body() {
 	rm -rf pkg_a
 	xbps-rindex -a *.xbps
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -yu
+	xbps-install -C null.conf -r rootdir --repository=$PWD -yu
 	atf_check_equal $? 0
 	tgt=$(readlink rootdir/foo)
 	rval=1
diff --git a/tests/xbps/libxbps/shell/issue6_test.sh b/tests/xbps/libxbps/shell/issue6_test.sh
index 6cb5a0db..7a32c0ee 100644
--- a/tests/xbps/libxbps/shell/issue6_test.sh
+++ b/tests/xbps/libxbps/shell/issue6_test.sh
@@ -24,7 +24,7 @@ issue6_body() {
 	atf_check_equal $? 0
 	xbps-rindex -a *.xbps
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -y a
+	xbps-install -C null.conf -r rootdir --repository=$PWD -y a
 	atf_check_equal $? 0
 	mkdir -p rootdir/usr/lib/firefox/dictionaries
 	mkdir -p rootdir/usr/lib/firefox/hyphenation
@@ -36,7 +36,7 @@ issue6_body() {
 	rm -rf pkg_a
 	xbps-rindex -a *.xbps
 	atf_check_equal $? 0
-	xbps-install -r rootdir --repository=$PWD -yu
+	xbps-install -C null.conf -r rootdir --repository=$PWD -yu
 	atf_check_equal $? 0
 	tgt1=$(readlink rootdir/usr/lib/firefox/dictionaries)
 	tgt2=$(readlink rootdir/usr/lib/firefox/hyphenation)