diff --git a/Cargo.toml b/Cargo.toml
index aee917c1..c1186158 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -85,3 +85,6 @@ bincode = "1.2.1"
 # RUSTDOCFLAGS="--cfg doc_cfg" cargo +nightly doc --all-features --no-deps --open
 all-features = true
 rustdoc-args = ["--cfg", "doc_cfg"]
+
+[package.metadata.playground]
+features = ["small_rng", "serde1"]
diff --git a/rand_core/Cargo.toml b/rand_core/Cargo.toml
index a53a1215..7f8a17d4 100644
--- a/rand_core/Cargo.toml
+++ b/rand_core/Cargo.toml
@@ -28,3 +28,6 @@ getrandom = { version = "0.2", optional = true }
 # RUSTDOCFLAGS="--cfg doc_cfg" cargo +nightly doc --all-features --no-deps --open
 all-features = true
 rustdoc-args = ["--cfg", "doc_cfg"]
+
+[package.metadata.playground]
+all-features = true