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Diffstat (limited to 'internal/stupidgcm/stupidgcm_test.go')
-rw-r--r--internal/stupidgcm/stupidgcm_test.go7
1 files changed, 7 insertions, 0 deletions
diff --git a/internal/stupidgcm/stupidgcm_test.go b/internal/stupidgcm/stupidgcm_test.go
index dfd495d..82516b3 100644
--- a/internal/stupidgcm/stupidgcm_test.go
+++ b/internal/stupidgcm/stupidgcm_test.go
@@ -1,3 +1,10 @@
+// +build go1.5
+// = go 1.5 or higher
+//
+// We compare against Go's built-in GCM implementation. Since stupidgcm only
+// supports 128-bit IVs and Go only supports that from 1.5 onward, we cannot
+// run these tests on older Go versions.
+
package stupidgcm
import (