diff --git a/libnczarr/zdebug.h b/libnczarr/zdebug.h
index 8c19d9f47a..83f45cdef3 100644
--- a/libnczarr/zdebug.h
+++ b/libnczarr/zdebug.h
@@ -5,7 +5,7 @@
 #ifndef ZDEBUG_H
 #define ZDEBUG_H
 
-#define ZCATCH /* Warning: significant performance impact */
+#undef ZCATCH /* Warning: significant performance impact */
 #undef ZTRACING /* Warning: significant performance impact */
 
 #undef ZDEBUG /* general debug */
diff --git a/nczarr_test/Makefile.am b/nczarr_test/Makefile.am
index 5d9524ae86..22f5b6ac74 100644
--- a/nczarr_test/Makefile.am
+++ b/nczarr_test/Makefile.am
@@ -340,15 +340,6 @@ clean-local:
 	rm -fr testdir_* testset_*
 	rm -fr tmp_*.nc tmp_*.zarr tst_quantize*.zarr tmp*.file results.file results.s3 results.zip
 	rm -fr rcmiscdir ref_power_901_constants.file 
-
-check-local:
-	rm -fr ${execdir}/v3tests.sh
-	echo "#!/bin/sh" > ${EXECDIR}.v3tests.sh
-	echo "am_check_pre" >> ${execdir}/v3tests.sh
-	echo "T=\"$TESTS\"" >> ${execdir}/v3tests.sh
-	cat ${srcdir}/v3tests.in >> ${execdir}/v3tests.sh
-	chmod a+x ${execdir}/v3tests.sh
-	source ${execdir}/v3tests.sh
 if ENABLE_S3_TESTALL
 	bash ${abs_top_builddir}/s3cleanup.sh
 endif