diff --git a/jstests/libs/bulk_write_passthrough_runner.js b/jstests/libs/bulk_write_passthrough_runner.js
index 611be53bafb..4062b8a5116 100644
--- a/jstests/libs/bulk_write_passthrough_runner.js
+++ b/jstests/libs/bulk_write_passthrough_runner.js
@@ -2,6 +2,11 @@ const testFile = TestData.jsTestFile;
 
 try {
     await import(testFile);
+    if (typeof globalThis.__mochalite_closer === "function") {
+        // force the running of mocha-style tests immediately, instead of
+        // at the close of the shell's scope (outside this runner file)
+        await globalThis.__mochalite_closer();
+    }
 } finally {
     // Run a lightweight command to allow the override file to flush the remaining bulkWrite.
     // Ensure this command runs even if the test errors.
diff --git a/jstests/libs/txns/txn_passthrough_runner.js b/jstests/libs/txns/txn_passthrough_runner.js
index 4b2dc87681a..f3406d1eb8f 100644
--- a/jstests/libs/txns/txn_passthrough_runner.js
+++ b/jstests/libs/txns/txn_passthrough_runner.js
@@ -2,6 +2,11 @@ const testFile = TestData.multiStmtTxnTestFile;
 
 try {
     await import(testFile);
+    if (typeof globalThis.__mochalite_closer === "function") {
+        // force the running of mocha-style tests immediately, instead of
+        // at the close of the shell's scope (outside this runner file)
+        await globalThis.__mochalite_closer();
+    }
 } finally {
     // Run a lightweight command to allow the override file to commit the last command.
     // Ensure this command runs even if the test errors.