diff --git a/futures-testing/Cargo.toml b/futures-testing/Cargo.toml
index 3f3d3a7163..a074c6d758 100644
--- a/futures-testing/Cargo.toml
+++ b/futures-testing/Cargo.toml
@@ -20,10 +20,12 @@ name = "futures_testing"
 version = "0.3.0-alpha.2"
 path = "../futures-core"
 default-features = false
-features = ["std"]
 
 [dev-dependencies.futures-preview]
 version = "0.3.0-alpha.2"
 path = "../futures"
 default-features = false
-features = ["std"]
+
+[features]
+default = ["std"]
+std = ["futures-core-preview/std", "futures-preview/std"]