diff --git a/src/mime/type_test.go b/src/mime/type_test.go
index 2e55468dd7..6bdf37b635 100644
--- a/src/mime/type_test.go
+++ b/src/mime/type_test.go
@@ -5,6 +5,7 @@
 package mime
 
 import (
+	"internal/asan"
 	"slices"
 	"strings"
 	"sync"
@@ -143,6 +144,9 @@ func TestExtensionsByType(t *testing.T) {
 }
 
 func TestLookupMallocs(t *testing.T) {
+	if asan.Enabled {
+		t.Skip("test allocates more with -asan; see #70079")
+	}
 	n := testing.AllocsPerRun(10000, func() {
 		TypeByExtension(".html")
 		TypeByExtension(".HtML")