diff --git a/event_test.go b/event_test.go
index a6d9a9a..2817fbe 100644
--- a/event_test.go
+++ b/event_test.go
@@ -15,7 +15,7 @@ func TestEventParsingAndVerifying(t *testing.T) {
 		var ev Event
 		err := json.Unmarshal([]byte(raw), &ev)
 		if err != nil {
-			t.Errorf("failed to parse event json: %w", err)
+			t.Errorf("failed to parse event json: %v", err)
 		}
 
 		if ev.GetID() != ev.ID {
@@ -28,7 +28,7 @@ func TestEventParsingAndVerifying(t *testing.T) {
 
 		asjson, err := json.Marshal(ev)
 		if err != nil {
-			t.Errorf("failed to re marshal event as json: %w", err)
+			t.Errorf("failed to re marshal event as json: %v", err)
 		}
 
 		if string(asjson) != raw {
diff --git a/filter_test.go b/filter_test.go
index 26c2b54..e65507f 100644
--- a/filter_test.go
+++ b/filter_test.go
@@ -13,7 +13,7 @@ func TestFilterUnmarshal(t *testing.T) {
 	var f Filter
 	err := json.Unmarshal([]byte(raw), &f)
 	if err != nil {
-		t.Errorf("failed to parse filter json: %w", err)
+		t.Errorf("failed to parse filter json: %v", err)
 	}
 
 	if f.Since == nil || f.Since.Format("2006-01-02") != "2022-02-07" ||
@@ -32,7 +32,7 @@ func TestFilterMarshal(t *testing.T) {
 		Until: &tm,
 	})
 	if err != nil {
-		t.Errorf("failed to marshal filter json: %w", err)
+		t.Errorf("failed to marshal filter json: %v", err)
 	}
 
 	expected := `{"kinds":[1,2,4],"until":12345678,"#fruit":["banana","mango"]}`