diff --git a/Lib/_dummy_thread.py b/Lib/_dummy_thread.py
index 36e5f38ae..293669f35 100644
--- a/Lib/_dummy_thread.py
+++ b/Lib/_dummy_thread.py
@@ -14,7 +14,7 @@ Suggested usage is::
 # Exports only things specified by thread documentation;
 # skipping obsolete synonyms allocate(), start_new(), exit_thread().
 __all__ = ['error', 'start_new_thread', 'exit', 'get_ident', 'allocate_lock',
-           'interrupt_main', 'LockType']
+           'interrupt_main', 'LockType', 'RLock']
 
 # A dummy value
 TIMEOUT_MAX = 2**31
@@ -161,3 +161,35 @@ def interrupt_main():
     else:
         global _interrupt
         _interrupt = True
+
+class RLock:
+    def __init__(self):
+        self.locked_count = 0
+
+    def acquire(self, waitflag=None, timeout=-1):
+        self.locked_count += 1
+        return True
+
+    __enter__ = acquire
+
+    def __exit__(self, typ, val, tb):
+        self.release()
+
+    def release(self):
+        if not self.locked_count:
+            raise error
+        self.locked_count -= 1
+        return True
+
+    def locked(self):
+        return self.locked_status != 0
+
+    def __repr__(self):
+        return "<%s %s.%s object owner=%s count=%s at %s>" % (
+            "locked" if self.locked_count else "unlocked",
+            self.__class__.__module__,
+            self.__class__.__qualname__,
+            get_ident() if self.locked_count else 0,
+            self.locked_count,
+            hex(id(self))
+        )
diff --git a/Lib/functools.py b/Lib/functools.py
index 4cde5f590..59298455d 100644
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -18,7 +18,10 @@ from abc import get_cache_token
 from collections import namedtuple
 # import types, weakref  # Deferred to single_dispatch()
 from reprlib import recursive_repr
-from _thread import RLock
+try:
+    from _thread import RLock
+except ModuleNotFoundError:
+    from _dummy_thread import RLock
 
 
 ################################################################################
diff --git a/Lib/reprlib.py b/Lib/reprlib.py
index 616b3439b..6b0283b79 100644
--- a/Lib/reprlib.py
+++ b/Lib/reprlib.py
@@ -4,7 +4,10 @@ __all__ = ["Repr", "repr", "recursive_repr"]
 
 import builtins
 from itertools import islice
-from _thread import get_ident
+try:
+    from _thread import get_ident
+except ModuleNotFoundError:
+    from _dummy_thread import get_ident
 
 def recursive_repr(fillvalue='...'):
     'Decorator to make a repr function return fillvalue for a recursive call'
diff --git a/wasm/demo/src/index.js b/wasm/demo/src/index.js
index 9e03edb61..150fab739 100644
--- a/wasm/demo/src/index.js
+++ b/wasm/demo/src/index.js
@@ -148,7 +148,7 @@ function onReady() {
     runCodeFromTextarea();
 
     terminalVM = rp.vmStore.init('term_vm');
-    terminalVM.setStdout(data => localEcho.println(data));
+    terminalVM.setStdout(data => localEcho.print(data));
     readPrompts().catch(err => console.error(err));
 
     // so that the test knows that we're ready