diff --git a/config/dev-server-config.json b/config/dev-server-config.json
index d793c410a..609d8de58 100644
--- a/config/dev-server-config.json
+++ b/config/dev-server-config.json
@@ -211,7 +211,7 @@
          "enabled": ["_env", "${CAMLI_MONGO_ENABLED}", true],
          "handler": "storage-mongodbindexer",
          "handlerArgs": {
-             "servers": "localhost",
+             "host": "localhost",
              "database": ["_env", "${CAMLI_DBNAME}"],
              "blobSource": "/bs/"
          }
diff --git a/pkg/serverconfig/testdata/mongo-want.json b/pkg/serverconfig/testdata/mongo-want.json
new file mode 100644
index 000000000..018fca955
--- /dev/null
+++ b/pkg/serverconfig/testdata/mongo-want.json
@@ -0,0 +1,113 @@
+{
+	"listen": "localhost:3179",
+	"auth": "userpass:camlistore:pass3179",
+	"https": false,
+	"prefixes": {
+		"/": {
+			"handler": "root",
+			"handlerArgs": {
+				"blobRoot": "/bs-and-maybe-also-index/",
+				"ownerName": "Alice",
+				"searchRoot": "/my-search/",
+				"statusRoot": "/status/",
+				"stealth": false
+			}
+		},
+
+		"/ui/": {
+			"handler": "ui",
+			"handlerArgs": {
+				"jsonSignRoot": "/sighelper/",
+				"cache": "/cache/",
+				"scaledImage": "lrucache"
+			}
+		},
+
+		"/setup/": {
+			"handler": "setup"
+		},
+
+		"/status/": {
+			"handler": "status"
+		},
+
+		"/share/": {
+			"handler": "share",
+			"handlerArgs": {
+				"blobRoot": "/bs/"
+			}
+		},
+
+		"/sync/": {
+			"handler": "sync",
+			"handlerArgs": {
+				"from": "/bs/",
+				"to": "/index-mongo/"
+			}
+		},
+
+		"/sighelper/": {
+			"handler": "jsonsign",
+			"handlerArgs": {
+				"secretRing": "/path/to/secring",
+				"keyId": "26F5ABDA",
+				"publicKeyDest": "/bs-and-index/"
+			}
+		},
+
+		"/bs-and-index/": {
+			"handler": "storage-replica",
+			"handlerArgs": {
+				"backends": ["/bs/", "/index-mongo/"]
+			}
+		},
+
+		"/bs-and-maybe-also-index/": {
+			"handler": "storage-cond",
+			"handlerArgs": {
+				"write": {
+					"if": "isSchema",
+					"then": "/bs-and-index/",
+					"else": "/bs/"
+				},
+				"read": "/bs/"
+			}
+		},
+
+		"/bs/": {
+			"handler": "storage-filesystem",
+			"handlerArgs": {
+				"path": "/tmp/blobs"
+			}
+		},
+
+		"/cache/": {
+			"handler": "storage-filesystem",
+			"handlerArgs": {
+				"path": "/tmp/blobs/cache"
+			}
+		},
+
+		"/index-mongo/": {
+			"enabled": true,
+			"handler": "storage-mongodbindexer",
+			"handlerArgs": {
+				"host": "localhost",
+				"database": "camlitest",
+				"blobSource": "/bs/",
+				"user": "",
+				"password": ""
+			}
+		},
+
+		"/my-search/": {
+			"handler": "search",
+			"handlerArgs": {
+				"index": "/index-mongo/",
+				"owner": "sha1-f2b0b7da718b97ce8c31591d8ed4645c777f3ef4"
+			}
+		}
+
+	}
+
+}
diff --git a/pkg/serverconfig/testdata/mongo.json b/pkg/serverconfig/testdata/mongo.json
new file mode 100644
index 000000000..ff6bfd757
--- /dev/null
+++ b/pkg/serverconfig/testdata/mongo.json
@@ -0,0 +1,11 @@
+{
+	"listen": "localhost:3179",
+	"auth": "userpass:camlistore:pass3179",
+	"blobPath": "/tmp/blobs",
+	"dbname": "camlitest",
+	"mongo": ":@localhost",
+	"identity": "26F5ABDA",
+	"identitySecretRing": "/path/to/secring",
+	"ownerName": "Alice",
+	"shareHandlerPath": "/share/"
+}