diff --git a/block/block_manager_test.go b/block/block_manager_test.go
index 3e785f212..855e3744c 100644
--- a/block/block_manager_test.go
+++ b/block/block_manager_test.go
@@ -160,6 +160,52 @@ func TestBlockManagerEmpty(t *testing.T) {
 	}
 }
 
+func TestBlockManagerMultiplePrefixes(t *testing.T) {
+	data1 := seededRandomData(1, 600)
+	h := md5hash(data1)
+
+	data := map[string][]byte{}
+	bm := newTestBlockManager(data)
+
+	prefixes := []string{"A", "B", "C", "D", "E"}
+
+	for _, prefix := range prefixes {
+		b1, err := bm.WriteBlock("", data1, prefix)
+		if err != nil {
+			t.Errorf("error writing block with prefix %q", prefix)
+			continue
+		}
+
+		verifyBlock(t, bm, b1, data1)
+		bm.Flush()
+		verifyBlock(t, bm, b1, data1)
+
+		if got, want := b1, prefix+h; got != want {
+			t.Errorf("unexpected block ID: %v, want %v", got, want)
+		}
+	}
+
+	bm = newTestBlockManager(data)
+	for _, prefix := range prefixes {
+		verifyBlock(t, bm, prefix+h, data1)
+	}
+
+	if got, want := len(data), len(prefixes)+1; got != want {
+		t.Errorf("unexpected block count: %v, wanted %v", got, want)
+	}
+
+	// should have 1 data block + indexes
+	if err := bm.CompactIndexes(fakeTime, nil); err != nil {
+		t.Errorf("error compacting indexes: %v", err)
+	}
+
+	if got, want := len(data), 2; got != want {
+		t.Errorf("unexpected block count: %v, wanted %v", got, want)
+	}
+
+	dumpBlockManagerData(data)
+}
+
 func TestBlockManagerPackIdentialToRawObject(t *testing.T) {
 	data0 := []byte{}
 	data1 := seededRandomData(1, 600)