diff --git a/test/T050-new.sh b/test/T050-new.sh
index 1141c1e3..bc20440b 100755
--- a/test/T050-new.sh
+++ b/test/T050-new.sh
@@ -329,6 +329,19 @@ notmuch config set new.tags "foo;;bar"
 output=$(NOTMUCH_NEW --quiet 2>&1)
 test_expect_equal "$output" ""
 
+test_begin_subtest "leading/trailing whitespace in new.tags is ignored"
+test_subtest_known_broken
+# avoid complications with leading spaces and "notmuch config"
+sed -i 's/^tags=.*$/tags= fu bar ; ; bar /' notmuch-config
+add_message
+NOTMUCH_NEW --quiet
+notmuch dump id:$gen_msg_id | sed 's/ --.*$//' > OUTPUT
+cat <<EOF >EXPECTED
+#notmuch-dump batch-tag:3 config,properties,tags
++bar +fu%20bar
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
 test_begin_subtest "Tags starting with '-' in new.tags are forbidden"
 notmuch config set new.tags "-foo;bar"
 output=$(NOTMUCH_NEW --debug 2>&1)
diff --git a/test/T070-insert.sh b/test/T070-insert.sh
index 208deb1c..9d29c859 100755
--- a/test/T070-insert.sh
+++ b/test/T070-insert.sh
@@ -234,6 +234,19 @@ output=$(notmuch show --format=json id:$gen_msg_id)
 test_json_nodes <<<"$output" \
 		'new_tags:[0][0][0]["tags"] = ["bar", "foo"]'
 
+test_begin_subtest "leading/trailing whitespace in new.tags is ignored"
+test_subtest_known_broken
+# avoid complications with leading spaces and "notmuch config"
+sed -i 's/^tags=.*$/tags= fu bar ; ; bar /' notmuch-config
+gen_insert_msg
+notmuch insert < $gen_msg_filename
+notmuch dump id:$gen_msg_id | sed 's/ --.*$//' > OUTPUT
+cat <<EOF >EXPECTED
+#notmuch-dump batch-tag:3 config,properties,tags
++bar +fu%20bar
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
 test_begin_subtest "Tags starting with '-' in new.tags are forbidden"
 notmuch config set new.tags "-foo;bar"
 gen_insert_msg
diff --git a/test/T590-libconfig.sh b/test/T590-libconfig.sh
index 9fa51fc0..912aaa1f 100755
--- a/test/T590-libconfig.sh
+++ b/test/T590-libconfig.sh
@@ -272,6 +272,30 @@ EOF
 test_expect_equal_file EXPECTED OUTPUT
 restore_database
 
+test_begin_subtest "notmuch_config_get_values (ignore leading/trailing whitespace)"
+test_subtest_known_broken
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} ${NOTMUCH_CONFIG} %NULL%
+{
+    notmuch_config_values_t *values;
+    EXPECT0(notmuch_config_set (db, NOTMUCH_CONFIG_NEW_TAGS, " a ; b c ; d "));
+    for (values = notmuch_config_get_values (db, NOTMUCH_CONFIG_NEW_TAGS);
+	 notmuch_config_values_valid (values);
+	 notmuch_config_values_move_to_next (values))
+    {
+	  puts (notmuch_config_values_get (values));
+    }
+}
+EOF
+cat <<'EOF' >EXPECTED
+== stdout ==
+a
+b c
+d
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+restore_database
+
 test_begin_subtest "notmuch_config_get_values_string"
 cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} ${NOTMUCH_CONFIG} %NULL%
 {