diff --git a/exporters/otlp/otlp_test.go b/exporters/otlp/otlp_test.go
index d83b1d0f16b9..6278d8004c7d 100644
--- a/exporters/otlp/otlp_test.go
+++ b/exporters/otlp/otlp_test.go
@@ -134,6 +134,12 @@ func newExporterEndToEndTest(t *testing.T, additionalOpts []otlp.ExporterOption)
 		if got, want := len(attrMap), m; got != want {
 			t.Fatalf("span attribute unique values: got %d  want %d", got, want)
 		}
+		for i := 0; i < m; i++ {
+			_, ok := attrMap[int64(i)]
+			if !ok {
+				t.Fatalf("span with attribute %d missing", i)
+			}
+		}
 	}
 }