diff --git a/build.rs b/build.rs
index 22b53276d10e..6cdb1f3a80f0 100644
--- a/build.rs
+++ b/build.rs
@@ -36,7 +36,13 @@ fn main() -> anyhow::Result<()> {
             test_directory_module(out, "tests/misc_testsuite/memory64", strategy)?;
             test_directory_module(out, "tests/misc_testsuite/component-model", strategy)?;
             test_directory_module(out, "tests/misc_testsuite/function-references", strategy)?;
-            test_directory_module(out, "tests/misc_testsuite/winch", strategy)?;
+            // The testsuite of Winch is a subset of the official
+            // WebAssembly test suite, until parity is reached. This
+            // check is in place to prevent Cranelift from duplicating
+            // tests.
+            if *strategy == "Winch" {
+                test_directory_module(out, "tests/misc_testsuite/winch", strategy)?;
+            }
             Ok(())
         })?;