diff --git a/tests/test_run.sh b/tests/test_run.sh
index c1ed01d..3d86252 100755
--- a/tests/test_run.sh
+++ b/tests/test_run.sh
@@ -24,15 +24,19 @@ testroot=$(cd $(dirname "$0"); echo $PWD)
 if [ -x "$testroot/../sysbench/sysbench" ]
 then
     # Invoked from a source directory?
-    export PATH="$testroot/../sysbench:$PATH"
+    PATH="$testroot/../sysbench:$PATH"
 elif  [ -x "$testroot/../bin" ]
 then
     # Invoked from a standalone install root directory?
-    export PATH="$testroot/../bin:$PATH"
+    PATH="$testroot/../bin:$PATH"
 elif [ -x "$testroot/../../../bin/sysbench" ]
 then
     # Invoked from a system-wide install (e.g. /usr/local/share/sysbench/tests)?
-    export PATH="$testroot/../../../bin:$PATH"
+    PATH="$testroot/../../../bin:$PATH"
+elif [ -x "$PWD/../sysbench/sysbench" ]
+then
+    # Invoked from the build directory by 'make distcheck'?
+    PATH="$PWD/../sysbench:$PATH"
 fi
 
 if ! which sysbench >/dev/null 2>&1
@@ -41,6 +45,7 @@ then
     echo "testroot=$testroot"
     echo "PWD=$PWD"
     ls -l $PWD
+    ls -l $PWD/../sysbench
     ls -l $testroot
     ls -l $testroot/..
     ls -l $testroot/../sysbench