diff --git a/internal/graphicscommand/shader.go b/internal/graphicscommand/shader.go
index c91b8905b..193f94d2b 100644
--- a/internal/graphicscommand/shader.go
+++ b/internal/graphicscommand/shader.go
@@ -211,7 +211,7 @@ func (s *Shader) convertUniforms(uniforms map[string]interface{}) [][]float32 {
 			case []float32:
 				us[idx.resultIndex] = v
 			default:
-				panic(fmt.Sprintf("ebiten: unexpected uniform value type: %s, %T", name, v))
+				panic(fmt.Sprintf("graphicscommand: unexpected uniform value type: %s, %T", name, v))
 			}
 			continue
 		}
diff --git a/internal/mipmap/mipmap.go b/internal/mipmap/mipmap.go
index ebd04f7a4..de7ce7c3f 100644
--- a/internal/mipmap/mipmap.go
+++ b/internal/mipmap/mipmap.go
@@ -155,11 +155,11 @@ func (m *Mipmap) setImg(level int, img *buffered.Image) {
 
 func (m *Mipmap) level(level int) *buffered.Image {
 	if level == 0 {
-		panic("ebiten: level must be non-zero at level")
+		panic("mipmap: level must be non-zero at level")
 	}
 
 	if m.volatile {
-		panic("ebiten: mipmap images for a volatile image is not implemented yet")
+		panic("mipmap: mipmap images for a volatile image is not implemented yet")
 	}
 
 	if img, ok := m.imgs[level]; ok {
@@ -185,7 +185,7 @@ func (m *Mipmap) level(level int) *buffered.Image {
 		vs = graphics.QuadVertices(0, 0, float32(w), float32(h), 0.5, 0, 0, 0.5, 0, 0, 1, 1, 1, 1)
 		filter = graphicsdriver.FilterLinear
 	default:
-		panic(fmt.Sprintf("ebiten: invalid level: %d", level))
+		panic(fmt.Sprintf("mipmap: invalid level: %d", level))
 	}
 	is := graphics.QuadIndices()
 
diff --git a/internal/ui/context.go b/internal/ui/context.go
index 3e1647651..956656ebe 100644
--- a/internal/ui/context.go
+++ b/internal/ui/context.go
@@ -222,7 +222,7 @@ func (g *globalState) maxTPS() int {
 
 func (g *globalState) setMaxTPS(tps int) {
 	if tps < 0 && tps != clock.SyncWithFPS {
-		panic("ebiten: tps must be >= 0 or SyncWithFPS")
+		panic("ui: tps must be >= 0 or SyncWithFPS")
 	}
 	atomic.StoreInt32(&g.maxTPS_, int32(tps))
 }