diff --git a/packages/js/test/index.js b/packages/js/test/index.js
index 237f6c1..ebd2b69 100644
--- a/packages/js/test/index.js
+++ b/packages/js/test/index.js
@@ -3,42 +3,31 @@ import { createStdinReader } from '@terrace-lang/js/readers/node-readline'
 
 const testName = process.argv[2]
 
+async function linedata_basic(indent) {
+  const lineData = createLineData('', indent)
+  const next = createStdinReader()
 
-const tests = {
-  'linedata:basic': async () => {
-    const lineData = createLineData('')
-    const next = createStdinReader()
-
-    while ((lineData.line = await next()) != null) {
-      parseLine(lineData)
-      const { level, indent, offsetHead, offsetTail, line } = lineData
-      console.log(`| level ${level} | indent ${indent} | offsetHead ${offsetHead} | offsetTail ${offsetTail} | line ${line} |`)
-    }
-  },
-  'linedata:tabs': async () => {
-    const lineData = createLineData('', '\t')
-    const next = createStdinReader()
-
-    while ((lineData.line = await next()) != null) {
-      parseLine(lineData)
-      const { level, indent, offsetHead, offsetTail, line } = lineData
-      console.log(`| level ${level} | indent ${indent} | offsetHead ${offsetHead} | offsetTail ${offsetTail} | line ${line} |`)
-    }
-  },
-  'linedata:head-tail': async () => {
-    const lineData = createLineData('')
-    const next = createStdinReader()
-
-    while ((lineData.line = await next()) != null) {
-      parseLine(lineData)
-      const { level, indent, offsetHead, offsetTail, line } = lineData
-      const head = line.slice(offsetHead, offsetTail)
-      const tail = line.slice(offsetTail + 1)
-
-      console.log(`| head ${head} | tail ${tail} |`)
-    }
+  while ((lineData.line = await next()) != null) {
+    parseLine(lineData)
+    const { level, indent, offsetHead, offsetTail, line } = lineData
+    console.log(`| level ${level} | indent ${indent} | offsetHead ${offsetHead} | offsetTail ${offsetTail} | line ${line} |`)
   }
 }
 
-const test = tests[testName]
-await test()
+async function linedata_head_tail () {
+  const lineData = createLineData('')
+  const next = createStdinReader()
+
+  while ((lineData.line = await next()) != null) {
+    parseLine(lineData)
+    const { level, indent, offsetHead, offsetTail, line } = lineData
+    const head = line.slice(offsetHead, offsetTail)
+    const tail = line.slice(offsetTail + 1)
+
+    console.log(`| head ${head} | tail ${tail} |`)
+  }
+}
+
+if (testName === 'linedata:basic') await linedata_basic()
+if (testName === 'linedata:tabs') await linedata_basic('\t')
+if (testName === 'linedata:head-tail') await linedata_head_tail()
diff --git a/packages/python/test/index.py b/packages/python/test/index.py
index d0f738c..3dd08c8 100644
--- a/packages/python/test/index.py
+++ b/packages/python/test/index.py
@@ -13,8 +13,8 @@ def next():
   # return None if there actually is no result.
   return line.rstrip('\n') if len(line) > 0 else None
 
-def linedata_basic ():
-  lineData = createLineData('')
+def linedata_basic (indent):
+  lineData = createLineData('', indent)
 
   while (l := next()) != None:
     lineData['line'] = l
@@ -46,18 +46,12 @@ def linedata_head_tail ():
       head = head, tail = tail
     ))
 
-
-tests = {
-  'linedata:basic': linedata_basic,
-  'linedata:tabs': linedata_tabs,
-  'linedata:head-tail': linedata_head_tail
-}
-
-
 def main():
   testName = sys.argv[1]
-  test = tests[testName]
-  test()
+
+  if testName == 'linedata:basic': linedata_basic(' ')
+  if testName == 'linedata:tabs': linedata_basic('\t')
+  if testName == 'linedata:head-tail': linedata_head_tail()
 
 if __name__ == "__main__":
   main()