diff --git a/tcl.spec b/tcl.spec
index 2e33571..d4c4b8b 100644
--- a/tcl.spec
+++ b/tcl.spec
@@ -91,20 +91,6 @@ eval $MAKE
 # Some of the regressioin tests write to $HOME, so better redirect them
 mkdir home
 export HOME=$PWD/home
-# Run the testsuite to gather some data for the profile-based
-# optimisation and let rpmbuild fail on unexpected test failures.
-cat > known-failures <<EOF
-httpold-4.12
-mathop-25.14
-EOF
-eval $MAKE test 2>&1 | tee testresults
-grep FAILED testresults | grep -Fqvf known-failures && exit 1
-# If we don't do profile based optimisation, we are done at this point.
-test -z "$PFLAGS" && exit 0
-# Rebuild and use the profiling results
-make clean
-PFLAGS="%cflags_profile_feedback"
-eval $MAKE
 
 %install
 make -C unix install install-private-headers \