diff --git a/printer_test.go b/printer_test.go
index 261f0bf..50120d8 100644
--- a/printer_test.go
+++ b/printer_test.go
@@ -1,12 +1,12 @@
 package log
 
 import (
+	"context"
 	"fmt"
 	"testing"
 )
 
 func TestNewPrinter(t *testing.T) {
-	var l Logger
-	l = NewPrinter("stdout", fmt.Printf)
-	l.Infof(nil, "Hello, %s!", "world")
+	l := NewPrinter("stdout", fmt.Printf)
+	l.Infof(context.TODO(), "Hello, %s!", "world")
 }
diff --git a/testing_logger_test.go b/testing_logger_test.go
index fa4a806..79b1777 100644
--- a/testing_logger_test.go
+++ b/testing_logger_test.go
@@ -1,6 +1,7 @@
 package log
 
 import (
+	"context"
 	"testing"
 )
 
@@ -15,11 +16,11 @@ func TestNewTestingLogger(t *testing.T) {
 	if name := logger.Name(); name != loggerName {
 		t.Errorf("logger.Name() = %s, want %s", name, loggerName)
 	}
-	logger.Debugf(nil, "Hello, %s!", "World")
-	logger.Infof(nil, "Hello, %s!", "World")
-	logger.Warningf(nil, "Hello, %s!", "World")
-	logger.Errorf(nil, "Hello, %s!", "World")
-	logger.Criticalf(nil, "Hello, %s!", "World")
+	logger.Debugf(context.TODO(), "Hello, %s!", "World")
+	logger.Infof(context.TODO(), "Hello, %s!", "World")
+	logger.Warningf(context.TODO(), "Hello, %s!", "World")
+	logger.Errorf(context.TODO(), "Hello, %s!", "World")
+	logger.Criticalf(context.TODO(), "Hello, %s!", "World")
 
 	defer func() {
 		if r := recover(); r == nil {