diff --git a/lang/python/tests/Makefile.am b/lang/python/tests/Makefile.am
index 62dddaae..40a26e2a 100644
--- a/lang/python/tests/Makefile.am
+++ b/lang/python/tests/Makefile.am
@@ -107,6 +107,7 @@ pubring-stamp: $(test_srcdir)/pubdemo.asc gpg-sample.stamp
                --import $(test_srcdir)/pubdemo.asc
 	-$(TESTS_ENVIRONMENT) $(GPG) --batch --no-permission-warning \
 		--import $(test_srcdir)/secdemo.asc
+	-$(TESTS_ENVIRONMENT) gpgconf --kill all
 	echo x > ./pubring-stamp
 
 gpg.conf:
diff --git a/lang/qt/tests/Makefile.am b/lang/qt/tests/Makefile.am
index 601d5062..d9713d90 100644
--- a/lang/qt/tests/Makefile.am
+++ b/lang/qt/tests/Makefile.am
@@ -136,6 +136,7 @@ pubring-stamp: $(top_srcdir)/tests/gpg/pubdemo.asc \
 	$(TESTS_ENVIRONMENT) $(GPG) --no-permission-warning \
 		   --passphrase "abc" \
            --import $(top_srcdir)/tests/gpg/secdemo.asc
+	-$(TESTS_ENVIRONMENT) gpgconf --kill all
 	touch pubring-stamp
 
 .cpp.moc:
diff --git a/tests/gpg/Makefile.am b/tests/gpg/Makefile.am
index c4a4ce42..6a82ca68 100644
--- a/tests/gpg/Makefile.am
+++ b/tests/gpg/Makefile.am
@@ -110,6 +110,7 @@ pubring-stamp: $(srcdir)/pubdemo.asc gpg-sample.stamp
 		--import $(srcdir)/secdemo.asc
 	-$(TESTS_ENVIRONMENT) $(GPG) --batch --no-permission-warning \
 		--import-ownertrust $(srcdir)/ownertrust.txt
+	-$(TESTS_ENVIRONMENT) gpgconf --kill all
 	echo x > ./pubring-stamp
 
 gpg.conf: $(srcdir)/gpg.conf.in
diff --git a/tests/json/Makefile.am b/tests/json/Makefile.am
index 9b2cf71c..90fba79e 100644
--- a/tests/json/Makefile.am
+++ b/tests/json/Makefile.am
@@ -93,6 +93,7 @@ pubring-stamp: $(top_srcdir)/tests/gpg/pubdemo.asc gpg-sample.stamp
                --import $(top_srcdir)/tests/gpg/pubdemo.asc
 	-$(TESTS_ENVIRONMENT) $(GPG) --batch --no-permission-warning \
 		--import $(top_srcdir)/tests/gpg/secdemo.asc
+	-$(TESTS_ENVIRONMENT) gpgconf --kill all
 	echo x > ./pubring-stamp
 
 gpg.conf: