diff --git a/idma.mk b/idma.mk
index fb7f8a9e..9a350dfd 100644
--- a/idma.mk
+++ b/idma.mk
@@ -384,6 +384,8 @@ IDMA_VLT_ARGS  := --cc \
 IDMA_VLT_TOP     ?=
 IDMA_VLT_PARAMS  ?=
 
+IDMA_VLT_TEST_DIR   := $(IDMA_ROOT)/test/backend
+
 .PRECIOUS: $(IDMA_VLT_DIR)/%_elab.log
 
 $(IDMA_VLT_DIR)/%_elab.log: $(IDMA_PICKLE_DIR)/sources.json
@@ -399,9 +401,8 @@ $(IDMA_VLT_DIR)/%_elab.log: $(IDMA_PICKLE_DIR)/sources.json
 	rm -f $(IDMA_VLT_DIR)/$(IDMA_VLT_TOP).sv.pre
 	cd $(IDMA_VLT_DIR); $(VERILATOR) $(IDMA_VLT_ARGS) $(IDMA_VLT_PARAMS) -Mdir obj_$* $(IDMA_VLT_TOP).sv --top-module $(IDMA_VLT_TOP) 2> $*_elab.log
 
-$(IDMA_VLT_DIR)/idma.f: Bender.yml
-	mkdir -p $(IDMA_VLT_DIR)
-	$(BENDER) script verilator -t rtl -t idma_simulation -t snitch_cluster -t verilator -t verilator_test -DSYNTHESIS -DVERILATOR > $@
+$(IDMA_VLT_TEST_DIR)/idma.f: Bender.yml
+	$(BENDER) script verilator -t rtl -t idma_simulation -t snitch_cluster -t verilator -t verilator_test > $@
 
 idma_verilator_clean:
 	rm -rf $(IDMA_VLT_DIR)
@@ -486,6 +487,6 @@ idma_pickle_all: $(IDMA_PICKLE_ALL)
 
 idma_hw_all: $(IDMA_FULL_RTL) $(IDMA_INCLUDE_ALL) $(IDMA_FULL_TB) $(IDMA_HJSON_ALL) $(IDMA_WAVE_ALL)
 
-idma_sim_all: $(IDMA_VCS_DIR)/compile.sh $(IDMA_VSIM_DIR)/compile.tcl $(IDMA_VLT_DIR)/idma.f
+idma_sim_all: $(IDMA_VCS_DIR)/compile.sh $(IDMA_VSIM_DIR)/compile.tcl $(IDMA_VLT_TEST_DIR)/idma.f
 
 idma_all: idma_hw_all idma_sim_all idma_doc_all idma_pickle_all
diff --git a/target/.gitignore b/target/.gitignore
index e8ac3ac6..dd06202b 100644
--- a/target/.gitignore
+++ b/target/.gitignore
@@ -1,5 +1,3 @@
 doc
 morty
-sim/verilator/*
-!sim/verilator/driver.cpp
-!sim/verilator/idma.sh
+sim/verilator
diff --git a/test/backend/.gitignore b/test/backend/.gitignore
new file mode 100644
index 00000000..2c271ac4
--- /dev/null
+++ b/test/backend/.gitignore
@@ -0,0 +1,3 @@
+obj_dir
+*.f
+*.vcd
diff --git a/target/sim/verilator/driver.cpp b/test/backend/driver.cpp
similarity index 100%
rename from target/sim/verilator/driver.cpp
rename to test/backend/driver.cpp
diff --git a/target/sim/verilator/idma.sh b/test/backend/idma.sh
similarity index 100%
rename from target/sim/verilator/idma.sh
rename to test/backend/idma.sh
diff --git a/test/backend/tb_idma_backend.sv b/test/backend/tb_idma_backend.sv
index 75b39595..453950d0 100644
--- a/test/backend/tb_idma_backend.sv
+++ b/test/backend/tb_idma_backend.sv
@@ -16,7 +16,6 @@
 `include "obi/typedef.svh"
 `endif
 
-`include "memory_types.svh"
 `include "idma/typedef.svh"
 
 `ifndef BACKEND_NAME