internal: loosen oc test assertions

Change-Id: I3bf4fe44fa33e67e7feeb5935433150768bb987f
Reviewed-on: https://code-review.googlesource.com/25670
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
diff --git a/datastore/oc_test.go b/datastore/oc_test.go
index 9f38a13..36c3dfe 100644
--- a/datastore/oc_test.go
+++ b/datastore/oc_test.go
@@ -45,8 +45,8 @@
 		t.Fatalf("client.Put: %v", err)
 	}
 
-	if len(te.spans) != 1 {
-		t.Fatalf("Expected 1 span to be created, but got %d", len(te.spans))
+	if len(te.spans) == 0 {
+		t.Fatalf("Expected some span to be created, but got %d", 0)
 	}
 }
 
diff --git a/storage/oc_test.go b/storage/oc_test.go
index 51d08f5..42545e1 100644
--- a/storage/oc_test.go
+++ b/storage/oc_test.go
@@ -40,8 +40,8 @@
 	bkt := client.Bucket(bucketName)
 	bkt.Attrs(ctx)
 
-	if len(te.spans) != 1 {
-		t.Fatalf("Expected 1 span to be created, but got %d", len(te.spans))
+	if len(te.spans) == 0 {
+		t.Fatalf("Expected some spans to be created, but got %d", 0)
 	}
 }