diff --git a/src/SplatAccumulator.ts b/src/SplatAccumulator.ts
index 5ca9fc23..44388c0f 100644
--- a/src/SplatAccumulator.ts
+++ b/src/SplatAccumulator.ts
@@ -309,9 +309,6 @@ export class SplatAccumulator {
               );
               roots.push(output);
             }
-            if (!generator) {
-              throw new Error("Generator must be provided");
-            }
           }
           if (generator) {
             const outputDepth = outputSplatDepth(
diff --git a/test/unit/SplatAccumulator.test.ts b/test/unit/SplatAccumulator.test.ts
new file mode 100644
index 00000000..861cce2f
--- /dev/null
+++ b/test/unit/SplatAccumulator.test.ts
@@ -0,0 +1,21 @@
+import { expect, test } from "vitest";
+import { SplatAccumulator } from "../../src/SplatAccumulator";
+import type { CovSplatGenerator } from "../../src/SplatGenerator";
+import { dynoBlock } from "../../src/dyno/base";
+import { CovSplat } from "../../src/dyno/splats";
+
+function covGenerator(): CovSplatGenerator {
+  return dynoBlock({ index: "int" }, { covsplat: CovSplat }, () => ({}));
+}
+
+test.each([false, true])(
+  "covSplats accumulator with extSplats %s builds a program for a covSplats mesh",
+  (extSplats) => {
+    const accumulator = new SplatAccumulator({ extSplats, covSplats: true });
+    const { program } = accumulator.prepareProgramMaterial(
+      undefined,
+      covGenerator(),
+    );
+    expect(program).toBeTruthy();
+  },
+);