diff --git a/tools/unit_tests.py b/tools/unit_tests.py
index 0c4667b634..62844fc098 100755
--- a/tools/unit_tests.py
+++ b/tools/unit_tests.py
@@ -10,12 +10,19 @@ import sys
 # tests by the special string. permW0N0 means allow-write but not allow-net.
 # See js/test_util.ts for more details.
 def unit_tests(deno_exe):
-    run([deno_exe, "js/unit_tests.ts", "permW0N0E0"])
-    run([deno_exe, "js/unit_tests.ts", "permW1N0E0", "--allow-write"])
-    run([deno_exe, "js/unit_tests.ts", "permW0N1E0", "--allow-net"])
-    run([deno_exe, "js/unit_tests.ts", "permW0N0E1", "--allow-env"])
+    run([deno_exe, "--reload", "js/unit_tests.ts", "permW0N0E0"])
+    run([
+        deno_exe, "--reload", "js/unit_tests.ts", "permW1N0E0", "--allow-write"
+    ])
+    run([
+        deno_exe, "--reload", "js/unit_tests.ts", "permW0N1E0", "--allow-net"
+    ])
+    run([
+        deno_exe, "--reload", "js/unit_tests.ts", "permW0N0E1", "--allow-env"
+    ])
     run([
         deno_exe,
+        "--reload",
         "js/unit_tests.ts",
         "permW1N1E1",
         "--allow-write",