diff --git a/edalize/tools/vcs.py b/edalize/tools/vcs.py
index 1ceb1375..a4091dfe 100644
--- a/edalize/tools/vcs.py
+++ b/edalize/tools/vcs.py
@@ -157,19 +157,20 @@ def setup(self, edam):
         self.f_files["vcs.f"] = ["-top", self.toplevel] + self.tool_options.get(
             "vcs_options", []
         )
+        binary_name = self.name + ".vsim"
         self.commands.add(
             ["vcs"]
             + full64
-            + ["-o", self.name, "-file", "vcs.f", "-parameters", "parameters.txt"],
-            [self.name],
+            + ["-o", binary_name, "-file", "vcs.f", "-parameters", "parameters.txt"],
+            [binary_name],
             target_files + user_files + ["vcs.f", "parameters.txt"],
         )
 
         self.commands.add(
-            ["./" + self.name, "$(EXTRA_OPTIONS)"]
+            ["./" + binary_name, "$(EXTRA_OPTIONS)"]
             + self.tool_options.get("run_options", []),
             ["run"],
-            [self.name],
+            [binary_name],
         )
         self.commands.set_default_target(self.name)
 
diff --git a/tests/tools/vcs/basic/Makefile b/tests/tools/vcs/basic/Makefile
index 49c1c573..8a4d96e7 100644
--- a/tests/tools/vcs/basic/Makefile
+++ b/tests/tools/vcs/basic/Makefile
@@ -14,8 +14,8 @@ work_2/64/vhmra.sdb: vhdl_file.vhd vhdl2008_file vlog_incfile work_2.f
 libx/64/vhmra.sdb: vhdl_lfile libx.f
 	$(EDALIZE_LAUNCHER) vhdlan -full64 -f libx.f -work libx vhdl_lfile
 
-design: work/AN.DB/make.vlogan work_1/AN.DB/make.vlogan work_2/64/vhmra.sdb libx/64/vhmra.sdb user_file vcs.f parameters.txt
-	$(EDALIZE_LAUNCHER) vcs -full64 -o design -file vcs.f -parameters parameters.txt
+design.vsim: work/AN.DB/make.vlogan work_1/AN.DB/make.vlogan work_2/64/vhmra.sdb libx/64/vhmra.sdb user_file vcs.f parameters.txt
+	$(EDALIZE_LAUNCHER) vcs -full64 -o design.vsim -file vcs.f -parameters parameters.txt
 
-run: design
-	$(EDALIZE_LAUNCHER) ./design $(EXTRA_OPTIONS) and some run options
+run: design.vsim
+	$(EDALIZE_LAUNCHER) ./design.vsim $(EXTRA_OPTIONS) and some run options
diff --git a/tests/tools/vcs/minimal/Makefile b/tests/tools/vcs/minimal/Makefile
index f6c67c1a..a82692b8 100644
--- a/tests/tools/vcs/minimal/Makefile
+++ b/tests/tools/vcs/minimal/Makefile
@@ -14,8 +14,8 @@ work_2/64/vhmra.sdb: vhdl_file.vhd vhdl2008_file vlog_incfile work_2.f
 libx/64/vhmra.sdb: vhdl_lfile libx.f
 	$(EDALIZE_LAUNCHER) vhdlan -full64 -f libx.f -work libx vhdl_lfile
 
-design: work/AN.DB/make.vlogan work_1/AN.DB/make.vlogan work_2/64/vhmra.sdb libx/64/vhmra.sdb user_file vcs.f parameters.txt
-	$(EDALIZE_LAUNCHER) vcs -full64 -o design -file vcs.f -parameters parameters.txt
+design.vsim: work/AN.DB/make.vlogan work_1/AN.DB/make.vlogan work_2/64/vhmra.sdb libx/64/vhmra.sdb user_file vcs.f parameters.txt
+	$(EDALIZE_LAUNCHER) vcs -full64 -o design.vsim -file vcs.f -parameters parameters.txt
 
-run: design
-	$(EDALIZE_LAUNCHER) ./design $(EXTRA_OPTIONS)
+run: design.vsim
+	$(EDALIZE_LAUNCHER) ./design.vsim $(EXTRA_OPTIONS)