diff --git a/.changelog/12126.txt b/.changelog/12126.txt
new file mode 100644
index 000000000..5b0fd078a
--- /dev/null
+++ b/.changelog/12126.txt
@@ -0,0 +1,3 @@
+```release-note:improvement
+sdk: Add support for `Partition` and `RetryJoin` to the TestServerConfig struct.
+```
diff --git a/sdk/testutil/server.go b/sdk/testutil/server.go
index f017506d2..5f43bd998 100644
--- a/sdk/testutil/server.go
+++ b/sdk/testutil/server.go
@@ -77,6 +77,8 @@ type TestServerConfig struct {
 	Performance         *TestPerformanceConfig `json:"performance,omitempty"`
 	Bootstrap           bool                   `json:"bootstrap,omitempty"`
 	Server              bool                   `json:"server,omitempty"`
+	Partition           string                 `json:"partition,omitempty"`
+	RetryJoin           []string               `json:"retry_join,omitempty"`
 	DataDir             string                 `json:"data_dir,omitempty"`
 	Datacenter          string                 `json:"datacenter,omitempty"`
 	Segments            []TestNetworkSegment   `json:"segments"`