diff --git a/blockservice_test.go b/blockservice_test.go
index a94b672cfe00df54c04e361d99a3a2f8166eb03a..dfd12fc437b8c32883d99d3e8932ba3e40d5a79e 100644
--- a/blockservice_test.go
+++ b/blockservice_test.go
@@ -26,12 +26,18 @@ func TestWriteThroughWorks(t *testing.T) {
 	block := bgen.Next()
 
 	t.Logf("PutCounter: %d", bstore.PutCounter)
-	bserv.AddBlock(block)
+	err := bserv.AddBlock(block)
+	if err != nil {
+		t.Fatal(err)
+	}
 	if bstore.PutCounter != 1 {
 		t.Fatalf("expected just one Put call, have: %d", bstore.PutCounter)
 	}
 
-	bserv.AddBlock(block)
+	err = bserv.AddBlock(block)
+	if err != nil {
+		t.Fatal(err)
+	}
 	if bstore.PutCounter != 2 {
 		t.Fatalf("Put should have called again, should be 2 is: %d", bstore.PutCounter)
 	}
@@ -52,10 +58,15 @@ func TestLazySessionInitialization(t *testing.T) {
 	bgen := butil.NewBlockGenerator()
 
 	block := bgen.Next()
-	bstore.Put(block)
-
+	err := bstore.Put(block)
+	if err != nil {
+		t.Fatal(err)
+	}
 	block2 := bgen.Next()
-	session.HasBlock(block2)
+	err = session.HasBlock(block2)
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	bsession := NewSession(ctx, bservSessEx)
 	if bsession.ses != nil {
diff --git a/test/blocks_test.go b/test/blocks_test.go
index 95f552d21eb457a9d215282ec64d49dcabb31145..ee808e66e8573295d29c4d703894eb615089782c 100644
--- a/test/blocks_test.go
+++ b/test/blocks_test.go
@@ -74,7 +74,10 @@ func TestGetBlocksSequential(t *testing.T) {
 	var cids []cid.Cid
 	for _, o := range objs {
 		cids = append(cids, o.Cid())
-		servs[0].AddBlock(o)
+		err := servs[0].AddBlock(o)
+		if err != nil {
+			t.Fatal(err)
+		}
 	}
 
 	t.Log("one instance at a time, get blocks concurrently")