diff --git a/library/test/src/lib.rs b/library/test/src/lib.rs
index 728c73d8c502a..f3c22061d25de 100644
--- a/library/test/src/lib.rs
+++ b/library/test/src/lib.rs
@@ -140,7 +140,10 @@ pub fn test_main(args: &[String], tests: Vec<TestDescAndFn>, options: Option<Opt
             });
             panic::set_hook(hook);
         }
-        match console::run_tests_console(&opts, tests) {
+        let res = console::run_tests_console(&opts, tests);
+        // Prevent Valgrind from reporting reachable blocks in users' unit tests.
+        drop(panic::take_hook());
+        match res {
             Ok(true) => {}
             Ok(false) => process::exit(ERROR_EXIT_CODE),
             Err(e) => {