diff --git a/Makefile.am b/Makefile.am
index 96dea436..90090f1b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -22,7 +22,7 @@ path_src  = src
 path_test = test
 
 # all source files will be run through hoxsl; see `applies' target
-apply_src  := $(shell find "$(path_src)" -name '*.xsl')
+apply_src  := $(shell find "$(path_src)" "$(path_test)" -name '*.xsl')
 apply_dest := $(apply_src:%.xsl=%.xsl.apply)
 
 # needed by test runner