diff --git a/examples/gno.land/p/demo/math/rand/isaac/gno.mod b/examples/gno.land/p/demo/math/rand/isaac/gno.mod
index 1099fabf423..6c0eb827042 100644
--- a/examples/gno.land/p/demo/math/rand/isaac/gno.mod
+++ b/examples/gno.land/p/demo/math/rand/isaac/gno.mod
@@ -1 +1,7 @@
 module gno.land/p/demo/math/rand/isaac
+
+require (
+	gno.land/p/demo/entropy v0.0.0-latest
+	gno.land/p/demo/math/rand/xorshiftr128plus v0.0.0-latest
+	gno.land/p/demo/ufmt v0.0.0-latest
+)
diff --git a/examples/gno.land/p/demo/math/rand/xorshift64star/gno.mod b/examples/gno.land/p/demo/math/rand/xorshift64star/gno.mod
index 902d91377ce..38072b16eb2 100644
--- a/examples/gno.land/p/demo/math/rand/xorshift64star/gno.mod
+++ b/examples/gno.land/p/demo/math/rand/xorshift64star/gno.mod
@@ -1 +1,6 @@
 module gno.land/p/demo/math/rand/xorshift64star
+
+require (
+	gno.land/p/demo/entropy v0.0.0-latest
+	gno.land/p/demo/ufmt v0.0.0-latest
+)
diff --git a/examples/gno.land/p/demo/math/rand/xorshiftr128plus/gno.mod b/examples/gno.land/p/demo/math/rand/xorshiftr128plus/gno.mod
index f591a91bef1..ecff84499c5 100644
--- a/examples/gno.land/p/demo/math/rand/xorshiftr128plus/gno.mod
+++ b/examples/gno.land/p/demo/math/rand/xorshiftr128plus/gno.mod
@@ -1 +1,6 @@
 module gno.land/p/demo/math/rand/xorshiftr128plus
+
+require (
+	gno.land/p/demo/entropy v0.0.0-latest
+	gno.land/p/demo/ufmt v0.0.0-latest
+)
diff --git a/examples/gno.land/p/demo/ufmt/ufmt_test.gno b/examples/gno.land/p/demo/ufmt/ufmt_test.gno
index d53fb39bc44..dc2076e5943 100644
--- a/examples/gno.land/p/demo/ufmt/ufmt_test.gno
+++ b/examples/gno.land/p/demo/ufmt/ufmt_test.gno
@@ -33,6 +33,7 @@ func TestSprintf(t *testing.T) {
 		{"uint16 [%d]", []interface{}{uint16(16)}, "uint16 [16]"},
 		{"uint32 [%d]", []interface{}{uint32(32)}, "uint32 [32]"},
 		{"uint64 [%d]", []interface{}{uint64(64)}, "uint64 [64]"},
+		{"float64 [%f]", []interface{}{float64(64.0)}, "float64 [64.0]"},
 		{"bool [%t]", []interface{}{true}, "bool [true]"},
 		{"bool [%t]", []interface{}{false}, "bool [false]"},
 		{"no args", nil, "no args"},