diff --git a/context_mention_menu_test.go b/context_mention_menu_test.go
index 4640122..081eb4e 100644
--- a/context_mention_menu_test.go
+++ b/context_mention_menu_test.go
@@ -14,8 +14,8 @@ var mentionSample = []ContextItem{
 	{ID: "f2", Label: "seating.xlsx", Detail: "~/ball", Kind: ContextFile},
 }
 
-// mentionTester filters items as an async source would, one frame late.
-type mentionTester struct {
+// mentionMenuTester filters items as an async source would, one frame late.
+type mentionMenuTester struct {
 	text    string
 	items   []ContextItem
 	loading bool
@@ -23,7 +23,7 @@ type mentionTester struct {
 	queries []string
 }
 
-func (m *mentionTester) view(c *ui.Context) {
+func (m *mentionMenuTester) view(c *ui.Context) {
 	Use(c, Settings{})
 	ui.Column(c).Fill().Justify(ui.End).Padding(16).Children(func() {
 		p := PromptComposer(c, &m.text, PromptComposerOptions{Label: "Prompt"})
@@ -44,7 +44,7 @@ func (m *mentionTester) view(c *ui.Context) {
 }
 
 func TestContextMentionMenuGroupsAndChooses(t *testing.T) {
-	m := &mentionTester{}
+	m := &mentionMenuTester{}
 	tt := ui.NewTester(m.view, 600, 500)
 	_ = tt.Click("Prompt")
 	tt.Type("Read @")
@@ -68,7 +68,7 @@ func TestContextMentionMenuGroupsAndChooses(t *testing.T) {
 }
 
 func TestContextMentionMenuOnlyAfterSpaceAndLoading(t *testing.T) {
-	m := &mentionTester{loading: true}
+	m := &mentionMenuTester{loading: true}
 	tt := ui.NewTester(m.view, 600, 500)
 	_ = tt.Click("Prompt")
 	tt.Type("mail@host")
@@ -93,13 +93,13 @@ func TestContextMentionMenuBadItem(t *testing.T) {
 			t.Fatal("no panic for an item without ID")
 		}
 	}()
-	m := &mentionTester{items: []ContextItem{{Label: "x"}}}
+	m := &mentionMenuTester{items: []ContextItem{{Label: "x"}}}
 	ui.NewTester(m.view, 300, 300)
 }
 
 func TestContextMentionMenuSnapshot(t *testing.T) {
 	snapshotAfter(t, "context_mention_menu", 560, 420, func(c *ui.Context) {
-		(*ui.Local(c.Root(), "m", func() *mentionTester { return &mentionTester{items: mentionSample} })).view(c)
+		(*ui.Local(c.Root(), "m", func() *mentionMenuTester { return &mentionMenuTester{items: mentionSample} })).view(c)
 	}, func(tt *ui.Tester) {
 		_ = tt.Click("Prompt")
 		tt.Type("Compare @")
diff --git a/trace_waterfall_test.go b/trace_waterfall_test.go
index 54ccd23..23779b1 100644
--- a/trace_waterfall_test.go
+++ b/trace_waterfall_test.go
@@ -8,7 +8,7 @@ import (
 	"github.com/egoist/mygo/ui"
 )
 
-var traceSample = []WaterfallSpan{
+var waterfallSample = []WaterfallSpan{
 	{ID: "db", Parent: "api", Name: "SELECT guests", Service: "postgres", Start: 40 * time.Millisecond, Duration: 90 * time.Millisecond},
 	{ID: "root", Name: "GET /ball", Service: "gateway", Duration: 320 * time.Millisecond},
 	{ID: "api", Parent: "root", Name: "ListGuests", Service: "api", Start: 20 * time.Millisecond, Duration: 200 * time.Millisecond},
@@ -26,7 +26,7 @@ func traceTester(spans []WaterfallSpan, changes *int) *ui.Tester {
 
 func TestTraceWaterfallOrderAndDetail(t *testing.T) {
 	n := 0
-	tt := traceTester(traceSample, &n)
+	tt := traceTester(waterfallSample, &n)
 	if !tt.HasText("4 spans · 320 ms") {
 		t.Fatalf("summary: %q", tt.Texts())
 	}
@@ -73,6 +73,6 @@ func TestTraceWaterfallRulesAndMany(t *testing.T) {
 
 func TestTraceWaterfallSnapshot(t *testing.T) {
 	snapshot(t, "trace_waterfall", 680, 280, func(c *ui.Context) {
-		ui.Column(c).Padding(16).Children(func() { TraceWaterfall(c, traceSample, TraceWaterfallOptions{Height: 180}) })
+		ui.Column(c).Padding(16).Children(func() { TraceWaterfall(c, waterfallSample, TraceWaterfallOptions{Height: 180}) })
 	})
 }