diff --git a/src/bin/auth/tests/config_unittest.cc b/src/bin/auth/tests/config_unittest.cc
index a80a9c80e5..96e447c35c 100644
--- a/src/bin/auth/tests/config_unittest.cc
+++ b/src/bin/auth/tests/config_unittest.cc
@@ -313,6 +313,13 @@ TEST_F(MemoryDatasrcConfigTest, addDuplicateZones) {
 }
 
 TEST_F(MemoryDatasrcConfigTest, addBadZone) {
+    // origin and file are missing
+    EXPECT_THROW(parser->build(
+                     Element::fromJSON(
+                         "[{\"type\": \"memory\","
+                         "  \"zones\": [{}]}]")),
+                 AuthConfigError);
+
     // origin is missing
     EXPECT_THROW(parser->build(
                      Element::fromJSON(
@@ -320,6 +327,13 @@ TEST_F(MemoryDatasrcConfigTest, addBadZone) {
                          "  \"zones\": [{\"file\": \"example.zone\"}]}]")),
                  AuthConfigError);
 
+    // file is missing
+    EXPECT_THROW(parser->build(
+                     Element::fromJSON(
+                         "[{\"type\": \"memory\","
+                         "  \"zones\": [{\"origin\": \"example.com\"}]}]")),
+                 AuthConfigError);
+
     // missing zone file
     EXPECT_THROW(parser->build(
                      Element::fromJSON(