diff --git a/cpython-unix/build-cpython.sh b/cpython-unix/build-cpython.sh
index 25ee091b..614f6b4c 100755
--- a/cpython-unix/build-cpython.sh
+++ b/cpython-unix/build-cpython.sh
@@ -146,6 +146,12 @@ if [ -n "${PYTHON_MEETS_MAXIMUM_VERSION_3_10}" ]; then
   patch -p1 -i ${ROOT}/patch-makesetup-deduplicate-objs.patch
 fi
 
+# testembed links against Tcl/Tk and libpython which already has Tcl/Tk leading
+# duplicate symbols and warnings from objc (which causes test failures).
+if [ -n "${PYTHON_MEETS_MAXIMUM_VERSION_3_13}" ]; then
+  patch -p1 -i ${ROOT}/patch-make-testembed-nolink-tcltk.patch
+fi
+
 # The default build rule for the macOS dylib doesn't pick up libraries
 # from modules / makesetup. So patch it accordingly.
 if [ -n "${PYTHON_MEETS_MINIMUM_VERSION_3_13}" ]; then
diff --git a/cpython-unix/patch-make-testembed-nolink-tcltk.patch b/cpython-unix/patch-make-testembed-nolink-tcltk.patch
new file mode 100644
index 00000000..65c1989f
--- /dev/null
+++ b/cpython-unix/patch-make-testembed-nolink-tcltk.patch
@@ -0,0 +1,10 @@
+diff --git a/Makefile.pre.in b/Makefile.pre.in
+--- a/Makefile.pre.in
++++ b/Makefile.pre.in
+@@ -1432,6 +1432,8 @@
+ 	$(RUNSHARED) ./$(BUILDPYTHON) $(srcdir)/Tools/build/generate_re_casefix.py $(srcdir)/Lib/re/_casefix.py
+
+ Programs/_testembed: Programs/_testembed.o $(LINK_PYTHON_DEPS)
++	$(eval MODLIBS := $(subst -Xlinker -hidden-ltcl8.6, , $(MODLIBS)))
++	$(eval MODLIBS := $(subst -Xlinker -hidden-ltk8.6, , $(MODLIBS)))
+ 	$(LINKCC) $(PY_CORE_LDFLAGS) $(LINKFORSHARED) -o $@ Programs/_testembed.o $(LINK_PYTHON_OBJS) $(LIBS) $(MODLIBS) $(SYSLIBS)