diff --git a/crates/swc_core/Cargo.toml b/crates/swc_core/Cargo.toml
index 7632c492545..b566131f423 100644
--- a/crates/swc_core/Cargo.toml
+++ b/crates/swc_core/Cargo.toml
@@ -150,6 +150,9 @@ css_utils      = ["__css", "swc_css_utils"]
 css_visit      = ["__css", "swc_css_visit"]
 css_visit_path = ["__css", "swc_css_visit/path"]
 
+# Utilities for testing.
+testing = ["dep:testing"]
+
 # Enable trace macro support.
 # TODO: Once all top-level package (node, wasm, cli..) imports swc_core,
 # we may encapsulate `tracing` package into swc_core.
@@ -333,11 +336,9 @@ swc_plugin                       = { optional = true, version = "0.90.0", path =
 swc_plugin_macro                 = { optional = true, version = "0.9.8", path = "../swc_plugin_macro" }
 swc_plugin_proxy                 = { optional = true, version = "0.19.3", path = "../swc_plugin_proxy" }
 swc_trace_macro                  = { optional = true, version = "0.1.2", path = "../swc_trace_macro" }
+testing                          = { optional = true, version = "0.30.2", path = "../testing" }
 # TODO: eventually swc_plugin_runner needs to remove default features
 swc_plugin_runner = { optional = true, version = "0.74.6", path = "../swc_plugin_runner", default-features = false }
 
-[dev-dependencies]
-testing = { version = "0.30.2", path = "../testing" }
-
 [build-dependencies]
 vergen = { version = "7.3.2", default-features = false, features = ["cargo"] }
diff --git a/crates/swc_core/src/lib.rs b/crates/swc_core/src/lib.rs
index 2321c7b8eb1..1658214b772 100644
--- a/crates/swc_core/src/lib.rs
+++ b/crates/swc_core/src/lib.rs
@@ -215,6 +215,15 @@ pub mod cached {
     pub use swc_cached::*;
 }
 
+// This reexports generic testing utilities only.
+// For the feature-specific (i.e ecma_transform_testing), need to enable
+// Corresponding features instead.
+#[cfg(feature = "testing")]
+#[cfg_attr(docsrs, doc(cfg(feature = "testing")))]
+pub mod testing {
+    pub use swc_testing::*;
+}
+
 #[cfg(feature = "allocator_node")]
 #[cfg_attr(docsrs, doc(cfg(feature = "allocator_node")))]
 extern crate swc_node_base;