diff --git a/Cargo.toml b/Cargo.toml
index 0f9050d62f..7858c98d34 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -41,7 +41,7 @@ core2 = { version = "0.3.0", optional = true, default-features = false }
 
 base64-compat = { version = "1.0.0", optional = true }
 bitcoinconsensus = { version = "0.19.0-3", optional = true }
-serde = { version = "1", features = [ "derive" ], optional = true }
+serde = { version = "1", default-features = false, features = [ "derive" ], optional = true }
 hashbrown = { version = "0.8", optional = true }
 
 [dev-dependencies]
diff --git a/contrib/test.sh b/contrib/test.sh
index 41503bc997..5ec0e50c31 100755
--- a/contrib/test.sh
+++ b/contrib/test.sh
@@ -93,7 +93,7 @@ if [ "$AS_DEPENDENCY" = true ]
 then
     cargo new dep_test
     cd dep_test
-    echo 'bitcoin = { path = "..", features = ["use-serde"] }' >> Cargo.toml
+    echo 'bitcoin = { path = "..", features = ["use-serde", "std"] }' >> Cargo.toml
 
     # Pin `cc` for Rust 1.29
     if [ -n "$PIN_VERSIONS" ]; then