diff --git a/ci/test.lua b/ci/test.lua
index 93ccfa349..0fb6ac49c 100644
--- a/ci/test.lua
+++ b/ci/test.lua
@@ -82,14 +82,16 @@ local function clean_require(module)
     return require(module)
 end
 
--- similar to clean_require above; forces clean load of scripts directly
--- included from a test file. note that this does *not* force indirectly loaded
--- scripts (that is, scripts that are reqscript()'d by the scripts that are
--- reqscript()'d by the test file) to be reloaded.
+-- forces clean load of scripts directly or indirectly included from the test
+-- file. we use our own scripts table instead of the one in dfhack.internal so
+-- we don't affect the state scripts that are used outside the test harness.
+local test_scripts = {is_test_scripts=true}
+local test_envvars = {}
 local function clean_reqscript(name)
-    dfhack.internal.scripts[dfhack.findScript(name)] = nil
-    return reqscript(name)
+    return dfhack.script_environment(name, true, test_envvars, test_scripts)
 end
+test_envvars.require = clean_require
+test_envvars.reqscript = clean_reqscript
 
 local function ensure_title_screen()
     if df.viewscreen_titlest:is_instance(dfhack.gui.getCurViewscreen()) then
@@ -192,18 +194,8 @@ local function save_test_status(status)
     json.encode_file(status, STATUS_FILE)
 end
 
--- causes scripts to be reloaded the next time they are reqscript()'d. this
--- allows scripts that change their behavior based on the value of
--- dfhack.internal.IN_TEST to return to non-test behavior after tests are run.
-local function invalidate_scripts()
-    for k,_ in pairs(dfhack.internal.scripts) do
-        dfhack.internal.scripts[k] = nil
-    end
-end
-
 local function finish_tests(done_command)
     dfhack.internal.IN_TEST = false
-    invalidate_scripts()
     if done_command and #done_command > 0 then
         dfhack.run_command(done_command)
     end
diff --git a/library/lua/dfhack.lua b/library/lua/dfhack.lua
index 26a23db55..f3956d174 100644
--- a/library/lua/dfhack.lua
+++ b/library/lua/dfhack.lua
@@ -562,7 +562,6 @@ function Script:get_flags()
 end
 
 internal.scripts = internal.scripts or {}
-local scripts = internal.scripts
 
 local hack_path = dfhack.getHackPath()
 
@@ -583,6 +582,7 @@ local valid_script_flags = {
     module_strict = {required = false},
     alias = {required = false},
     alias_count = {required = false},
+    scripts = {required = false},
 }
 
 function dfhack.run_script(name,...)
@@ -602,13 +602,18 @@ function dfhack.reqscript(name)
 end
 reqscript = dfhack.reqscript
 
-function dfhack.script_environment(name, strict)
+function dfhack.script_environment(name, strict, envVars, scripts)
+    scripts = scripts or internal.scripts
     local path = dfhack.findScript(name)
     if not scripts[path] or scripts[path]:needs_update() then
-        local _, env = dfhack.run_script_with_env(nil, name, {
-            module=true,
-            module_strict=(strict and true or false)  -- ensure that this key is present if 'strict' is nil
-        })
+        local _, env = dfhack.run_script_with_env(
+            envVars,
+            name,
+            {
+                scripts=scripts,
+                module=true,
+                module_strict=(strict and true or false)  -- ensure that this key is present if 'strict' is nil
+            })
         return env
     else
         if strict and not scripts[path]:get_flags().module then
@@ -625,6 +630,7 @@ function dfhack.run_script_with_env(envVars, name, flags, ...)
         error('Could not find script ' .. name)
     end
 
+    local scripts = flags.scripts or internal.scripts
     if scripts[file] == nil then
         scripts[file] = Script(file)
     end