diff --git a/cranelift/test-all.sh b/cranelift/test-all.sh
index 8afe66eebd..ca6744ec1c 100755
--- a/cranelift/test-all.sh
+++ b/cranelift/test-all.sh
@@ -64,7 +64,7 @@ cargo build
 
 # Run the tests. We run these in debug mode so that assertions are enabled.
 banner "Rust unit tests"
-cargo test --all
+RUST_BACKTRACE=1 cargo test --all
 
 # Make sure the documentation builds.
 banner "Rust documentation: $topdir/target/doc/cranelift/index.html"