diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index 9a65a11026..cb5fa14e7f 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -147,8 +147,8 @@ else
         TEST_IMG_FILE=$TEST_DIR/t.$IMGFMT
         TEST_IMG="ssh://127.0.0.1$TEST_IMG_FILE"
     elif [ "$IMGPROTO" = "nfs" ]; then
-        TEST_DIR="nfs://127.0.0.1/$TEST_DIR"
-        TEST_IMG=$TEST_DIR/t.$IMGFMT
+        TEST_IMG_FILE=$TEST_DIR/t.$IMGFMT
+        TEST_IMG="nfs://127.0.0.1$TEST_IMG_FILE"
     elif [ "$IMGPROTO" = "vxhs" ]; then
         TEST_IMG_FILE=$TEST_DIR/t.$IMGFMT
         TEST_IMG="vxhs://127.0.0.1:9999/t.$IMGFMT"