Revert r63934 -- it was mixing two patches.
diff --git a/PC/os2emx/Makefile b/PC/os2emx/Makefile
index 10cadf9..a2947a7 100644
--- a/PC/os2emx/Makefile
+++ b/PC/os2emx/Makefile
@@ -666,7 +666,7 @@
 # the test target
 test:
 	-find ../../Lib -name "*.py[co]" -exec rm {} ";"
-	-./python -E ../../lib/test/regrtest.py -l -u "network"
-	./python -E ../../lib/test/regrtest.py -l -u "network"
+	-./python -E -tt ../../lib/test/regrtest.py -l -u "network"
+	./python -E -tt ../../lib/test/regrtest.py -l -u "network"
 
 -include $(OUTBASE)python.dep
diff --git a/PC/os2emx/python26.def b/PC/os2emx/python26.def
index 3cdb44a..8bc91c8 100644
--- a/PC/os2emx/python26.def
+++ b/PC/os2emx/python26.def
@@ -49,6 +49,7 @@
   "PyParser_Delete"
 
 ; From python26_s.lib(parsetok)
+  "Py_TabcheckFlag"
   "PyParser_ParseString"
   "PyParser_ParseStringFlagsFilename"
   "PyParser_ParseFile"