diff --git a/tests/ZZ_hangman b/tests/ZZ_hangman
index 93127248..80ed9687 100755
--- a/tests/ZZ_hangman
+++ b/tests/ZZ_hangman
@@ -6,7 +6,8 @@
 # by reading /sys/kernel/debug/dri/0/i915_emon_status too quickly
 #
 
-. ./drm_lib.sh
+SOURCE_DIR="$( dirname "${BASH_SOURCE[0]}" )"
+. $SOURCE_DIR/drm_lib.sh
 
 cd $i915_path
 
diff --git a/tests/check_drm_clients b/tests/check_drm_clients
index 00a3485b..fed00cd5 100755
--- a/tests/check_drm_clients
+++ b/tests/check_drm_clients
@@ -1,5 +1,6 @@
 #!/bin/sh
 
-. ./drm_lib.sh
+SOURCE_DIR="$( dirname "${BASH_SOURCE[0]}" )"
+. $SOURCE_DIR/drm_lib.sh
 
 exit 0
diff --git a/tests/debugfs_emon_crash b/tests/debugfs_emon_crash
index 613b55b9..0f6c0a65 100755
--- a/tests/debugfs_emon_crash
+++ b/tests/debugfs_emon_crash
@@ -4,7 +4,8 @@
 # by reading /sys/kernel/debug/dri/0/i915_emon_status too quickly
 #
 
-. ./drm_lib.sh
+SOURCE_DIR="$( dirname "${BASH_SOURCE[0]}" )"
+. $SOURCE_DIR/drm_lib.sh
 
 for z in $(seq 1 1000); do
 	cat $i915_path/i915_emon_status > /dev/null
diff --git a/tests/debugfs_reader b/tests/debugfs_reader
index 1230fa9d..c17af2bb 100755
--- a/tests/debugfs_reader
+++ b/tests/debugfs_reader
@@ -1,6 +1,7 @@
 #!/bin/sh
 
-. ./drm_lib.sh
+SOURCE_DIR="$( dirname "${BASH_SOURCE[0]}" )"
+. $SOURCE_DIR/drm_lib.sh
 
 # read everything we can
 cat $i915_path/* > /dev/null 2>&1