diff --git a/src/decaf.c b/src/decaf.c
index 3822bd1..00303f1 100644
--- a/src/decaf.c
+++ b/src/decaf.c
@@ -1169,7 +1169,6 @@ void API_NS(point_from_hash_nonuniform) (
     point_t p,
     const unsigned char ser[SER_BYTES]
 ) {
-    /* TODO: test pathological case ur0^2 = 1/(1-d) */
     gf r0,r,a,b,c,N,e;
     gf_deserialize(r0,ser);
     gf_strong_reduce(r0);
diff --git a/test/test_decaf.cxx b/test/test_decaf.cxx
index 17f8651..295e281 100644
--- a/test/test_decaf.cxx
+++ b/test/test_decaf.cxx
@@ -195,7 +195,7 @@ static void test_arithmetic() {
 
 static const Block sqrt_minus_one;
 static const Block minus_sqrt_minus_one;
-static const Block elli_patho;
+static const Block elli_patho; /* sqrt(1/(u(1-d))) */
 
 static void test_elligator() {
     SpongeRng rng(Block("test_elligator"),SpongeRng::DETERMINISTIC);