diff --git a/extensions/spellcheck/hunspell/Makefile.in b/extensions/spellcheck/hunspell/Makefile.in
index 227d2c6d79a..091b24a8e1b 100644
--- a/extensions/spellcheck/hunspell/Makefile.in
+++ b/extensions/spellcheck/hunspell/Makefile.in
@@ -44,15 +44,15 @@ include $(DEPTH)/config/autoconf.mk
 MODULE		= hunspell
 DIRS = src
 
+ifdef ENABLE_TESTS
 XPCSHELL_TESTS = tests/unit
-
 ABS_topsrcdir = $(call core_abspath,$(topsrcdir))
-
 libs::
 	$(NSINSTALL) -D $(DEPTH)/_tests/xpcshell/$(relativesrcdir)/tests/unit/data
 	cd $(srcdir)/tests; $(PYTHON) $(ABS_topsrcdir)/config/nsinstall.py \
 	  ./ \
 	  $(call core_abspath,$(DEPTH)/_tests/xpcshell/$(relativesrcdir)/tests/unit/data/)
+endif
 
 include $(topsrcdir)/config/rules.mk