diff --git a/t/main.t b/t/main.t
index c4603fc..25acb35 100755
--- a/t/main.t
+++ b/t/main.t
@@ -5,7 +5,7 @@
 
 test_description='Main tests'
 
-. "${SHARNESS_TEST_SRCDIR-/usr/share/sharness}"/sharness.sh || exit 1
+. "${SHARNESS_TEST_SRCDIR-$(dirname "$0")/sharness}"/sharness.sh || exit 1
 
 check() {
 	echo "$3" > expected &&
diff --git a/t/smoke-test.t b/t/smoke-test.t
index 5bda86a..73ffff8 100755
--- a/t/smoke-test.t
+++ b/t/smoke-test.t
@@ -8,7 +8,7 @@
 
 test_description='Smoke test'
 
-. "${SHARNESS_TEST_SRCDIR-/usr/share/sharness}"/sharness.sh || exit 1
+. "${SHARNESS_TEST_SRCDIR-$(dirname "$0")/sharness}"/sharness.sh || exit 1
 
 check() {
 	echo "$3" > expected &&