diff --git a/internal/imgcache/eviction_internal_test.go b/internal/imgcache/eviction_internal_test.go
index 7a75e32..f7084d3 100644
--- a/internal/imgcache/eviction_internal_test.go
+++ b/internal/imgcache/eviction_internal_test.go
@@ -20,12 +20,14 @@ import (
 // implementation writes.
 const sqliteTimestampFormat = "2006-01-02 15:04:05"
 
-// testVariantKeyOne and testVariantKeyTwo are the variant cache keys
-// reused across the eviction tests as the first and second stored
-// variants.
+// testVariantKeyOne through testVariantKeyFour are the variant cache
+// keys reused across the eviction tests, in the order the tests store
+// them.
 const (
-	testVariantKeyOne VariantKey = "aabbccdd0001"
-	testVariantKeyTwo VariantKey = "aabbccdd0002"
+	testVariantKeyOne   VariantKey = "aabbccdd0001"
+	testVariantKeyTwo   VariantKey = "aabbccdd0002"
+	testVariantKeyThree VariantKey = "aabbccdd0003"
+	testVariantKeyFour  VariantKey = "aabbccdd0004"
 )
 
 // evictionTestDB creates an in-memory SQLite database with the real
@@ -340,7 +342,8 @@ func TestEvictToLimitEvictsLeastRecentlyUsedFirst(t *testing.T) {
 
 	now := time.Now()
 	keys := []VariantKey{
-		testVariantKeyOne, testVariantKeyTwo, "aabbccdd0003", "aabbccdd0004",
+		testVariantKeyOne, testVariantKeyTwo,
+		testVariantKeyThree, testVariantKeyFour,
 	}
 	fills := []byte{0x01, 0x02, 0x03, 0x04}
 	ages := []time.Duration{4 * time.Hour, 3 * time.Hour, 2 * time.Hour, 1 * time.Hour}
@@ -656,7 +659,9 @@ func TestEvictionRunsUnderWritePressure(t *testing.T) {
 	cache.StartEviction(time.Hour)
 	defer cache.StopEviction()
 
-	keys := []VariantKey{testVariantKeyOne, testVariantKeyTwo, "aabbccdd0003"}
+	keys := []VariantKey{
+		testVariantKeyOne, testVariantKeyTwo, testVariantKeyThree,
+	}
 	fills := []byte{0x11, 0x12, 0x13}
 
 	for i, key := range keys {
@@ -687,7 +692,9 @@ func TestEvictionRunsOnPeriodicSchedule(t *testing.T) {
 	cache.StartEviction(100 * time.Millisecond)
 	defer cache.StopEviction()
 
-	keys := []VariantKey{testVariantKeyOne, testVariantKeyTwo, "aabbccdd0003"}
+	keys := []VariantKey{
+		testVariantKeyOne, testVariantKeyTwo, testVariantKeyThree,
+	}
 	fills := []byte{0x21, 0x22, 0x23}
 
 	for i, key := range keys {