diff --git a/.gitignore b/.gitignore
index 93d51eee05..63ab56e2a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -51,6 +51,8 @@ flow/*.opennet
 flow/platforms/*
 !flow/platforms/nangate45
 
+flow/private/*
+
 # network
 .nfs*
 
diff --git a/flow/Makefile b/flow/Makefile
index 2978ac590b..f8fbdc1228 100644
--- a/flow/Makefile
+++ b/flow/Makefile
@@ -459,18 +459,12 @@ clean_all: clean_synth clean_floorplan clean_place clean_cts clean_route clean_f
 nuke: clean_test clean_issues
 	rm -rf ./results ./logs ./reports ./objects
 	rm -rf layer_*.mps macrocell.list *best.plt *_pdn.def dummy.guide run.param
-	rm -rf *.rpt *.rpt.old *.def.v innovus.* pin_dumper.log
+	rm -rf *.rpt *.rpt.old *.def.v pin_dumper.log
 	rm -rf versions.txt
 
 
 # DEF/GDS viewer shortcuts
 #-------------------------------------------------------------------------------
-$(foreach def,$(notdir $(wildcard $(RESULTS_DIR)/*.def)),innovus_$(def)): innovus_%:
-	innovus -execute "loadLefFile $(OBJECTS_DIR)/merged.lef ; \
-	                  loadDefFile $(RESULTS_DIR)/$* ; \
-	                  win" \
-	                  -no_logv ; stty sane
-
 RESULTS_DEF = $(notdir $(wildcard $(RESULTS_DIR)/*.def))
 RESULTS_GDS = $(notdir $(wildcard $(RESULTS_DIR)/*.gds))
 $(foreach file,$(RESULTS_DEF) $(RESULTS_GDS),klayout_$(file)): klayout_%: $(OBJECTS_DIR)/klayout.lyt
@@ -480,3 +474,4 @@ $(foreach file,$(RESULTS_DEF) $(RESULTS_GDS),klayout_$(file)): klayout_%: $(OBJE
 # Utilities
 #-------------------------------------------------------------------------------
 include $(UTILS_DIR)/utils.mk
+-include ./private/util/utils.mk
diff --git a/flow/test/test_helper.sh b/flow/test/test_helper.sh
index da94e6752e..fda62a3df4 100755
--- a/flow/test/test_helper.sh
+++ b/flow/test/test_helper.sh
@@ -21,10 +21,9 @@ set -o pipefail
 
 mkdir -p $TEST_DIR/logs/$PLATFORM
 
-if which innovus &> /dev/null; then
+if [ -f "./private/util/utils.mk" ]; then
   TARGETS="finish drc congestion"
 else
-  echo "INFO: No innovus installation detected; skipping third-party DRC"
   TARGETS="finish"
 fi
 
diff --git a/flow/util/explore_route.tcl b/flow/util/explore_route.tcl
deleted file mode 100644
index 1ad26f8650..0000000000
--- a/flow/util/explore_route.tcl
+++ /dev/null
@@ -1,60 +0,0 @@
-# Read process files
-foreach libFile $::env(LIB_FILES) {
-  read_liberty $libFile
-}
-read_lef $::env(OBJECTS_DIR)/merged_padded.lef
-read_def $::env(RESULTS_DIR)/4_cts.def
-
-
-## Setup
-set id "$::env(min_routing_layer)_$::env(max_routing_layer)_$::env(capacity_adjustment)_$::env(unidirectional_routing)_$::env(layers_adjustment1)_$::env(layers_adjustment2)_$::env(layers_adjustment3)_$::env(layers_adjustment4)_$::env(layers_adjustment5)_$::env(layers_adjustment6)_$::env(layers_adjustment7)"
-puts "Run ID: $id"
-
-file delete -force $::env(RESULTS_DIR)/explore/$id
-file mkdir $::env(RESULTS_DIR)/explore/$id
-
-## global_routing
-set_wire_rc -layer $::env(WIRE_RC_LAYER)
-fastroute -output_file $::env(RESULTS_DIR)/explore/$id/route.guide \
-  -min_routing_layer $::env(min_routing_layer) \
-  -max_routing_layer $::env(max_routing_layer) \
-  -capacity_adjustment $::env(capacity_adjustment) \
-  -unidirectional_routing $::env(unidirectional_routing) \
-  -layers_adjustment [list "1 $::env(layers_adjustment1)" \
-                           "2 $::env(layers_adjustment2)" \
-                           "3 $::env(layers_adjustment3)" \
-                           "4 $::env(layers_adjustment4)" \
-                           "5 $::env(layers_adjustment5)" \
-                           "6 $::env(layers_adjustment6)" \
-                           "7 $::env(layers_adjustment7)"]
-
-## Create Param File
-set paramFile [open "$::env(RESULTS_DIR)/explore/$id/TritonRoute.param" w]
-
-puts $paramFile "lef:$::env(TRITON_ROUTE_LEF)"
-puts $paramFile "def:$::env(RESULTS_DIR)/4_cts.def"
-puts $paramFile "guide:$::env(RESULTS_DIR)/explore/$id/route.guide"
-puts $paramFile "output:$::env(RESULTS_DIR)/explore/$id/5_route.def"
-puts $paramFile "outputTA:$::env(RESULTS_DIR)/explore/$id/5_route_TA.def"
-puts $paramFile "outputguide:$::env(RESULTS_DIR)/explore/$id/output_guide.mod"
-puts $paramFile "outputDRC:$::env(RESULTS_DIR)/explore/$id/5_route_drc.rpt"
-puts $paramFile "outputMaze:$::env(RESULTS_DIR)/explore/$id/maze.log"
-puts $paramFile "threads:1"
-puts $paramFile "cpxthreads:1"
-puts $paramFile "verbose:1"
-puts $paramFile "gap:0"
-puts $paramFile "timeout:2400"
-close $paramFile
-
-## TritonRoute
-exec TritonRoute $::env(RESULTS_DIR)/explore/$id/TritonRoute.param
-
-
-## Innovus DRC Checking
-exec innovus -no_gui -no_logv -execute "loadLefFile $::env(OBJECTS_DIR)/merged.lef ; \
-                                       loadDefFile $::env(RESULTS_DIR)/explore/$id/5_route.def; \
-                                       verify_drc -limit 10000 -report $::env(RESULTS_DIR)/explore/$id/drc.rpt; \
-                                       exit"
-
-
-exit
diff --git a/flow/util/utils.mk b/flow/util/utils.mk
index ed8d1d3e1e..695b7055f5 100644
--- a/flow/util/utils.mk
+++ b/flow/util/utils.mk
@@ -1,41 +1,14 @@
 # Utilities
 #===============================================================================
-drc: $(REPORTS_DIR)/drc.rpt
-$(REPORTS_DIR)/drc.rpt: finish
-	innovus -execute "loadLefFile $(OBJECTS_DIR)/merged.lef ; \
-	                  loadDefFile $(RESULTS_DIR)/5_route.def; \
-	                  verify_drc -limit 10000 -report $(REPORTS_DIR)/drc.rpt; \
-	                  exit" \
-	                  -no_gui -no_logv
-#; stty sane here breaks gnu parallel
-
-congestion: $(REPORTS_DIR)/congestion.rpt
-$(REPORTS_DIR)/congestion.rpt: $(RESULTS_DIR)/4_cts.def
-	innovus -execute "loadLefFile $(OBJECTS_DIR)/merged.lef ; \
-	                  loadDefFile $<; \
-	                  earlyGlobalRoute; \
-	                  describeCongestion > $@; \
-	                  reportCongestion -hotSpot -overflow >> $@; \
-	                  exit" \
-	                  -no_gui -no_logv
-#; stty sane here breaks gnu parallel
-
-
 grep_cells:
 	find ./logs/ -iname 1_1_yosys.log -exec sh -c "grep -iH 'Number of cells' {} | tail -1" \;
 
-grep_drc:
-	find ./reports/ -iname drc.rpt -exec sh -c "grep -iH 'viol' {} | tail -1" \;
-
-grep_congestion:
-	find ./reports/ -iname congestion.rpt -exec sh -c "grep -iH 'congestion index' {} | tail -1" \;
-
 grep_util:
 	find ./reports/ -iname 6_final_report.rpt -exec sh -c "grep -iH 'Design area' {} | tail -1" \;
 
 # Run test using gnu parallel
 #-------------------------------------------------------------------------------
-TEST_SCRIPT ?= $(TEST_DIR)/core_tests.sh
+TEST_SCRIPT ?= $(TEST_DIR)/gf14.sh
 run_test:
 	parallel --sshloginfile $(TEST_DIR)/nodes.txt \
 	         --timeout 21600 \
@@ -92,6 +65,3 @@ $(foreach script,$(ISSUE_SCRIPTS),$(script)_issue): %_issue : versions.txt
 clean_issues:
 	rm -rf $(foreach issue, $(ISSUE_SCRIPTS), $(issue)_*.tar.gz)
 	rm -rf vars.sh runme.sh
-
-explore:
-	min_routing_layer=2 max_routing_layer=7 capacity_adjustment=0 unidirectional_routing=1 layers_adjustment1=0.9 layers_adjustment2=0.5 layers_adjustment3=0.5 layers_adjustment4=0.5 layers_adjustment5=0.5 layers_adjustment6=0.5 layers_adjustment7=0.5 openroad -no_init ./util/explore_route.tcl
\ No newline at end of file