diff --git a/devel/run-tests b/devel/run-tests
index df61c37..58a083a 100755
--- a/devel/run-tests
+++ b/devel/run-tests
@@ -37,7 +37,7 @@ runtests() {
     >>test.out.stdout 2>>test.out.stderr &
   PID=$!
   kill -0 $PID || exit 1
-  python test.py
+  python3 test.py
   kill $PID
   wait $PID
 
@@ -48,7 +48,7 @@ runtests() {
     >>test.out.stdout 2>>test.out.stderr &
   PID=$!
   kill -0 $PID || exit 1
-  python test_forward.py
+  python3 test_forward.py
   kill $PID
   wait $PID
 
@@ -59,7 +59,7 @@ runtests() {
     >>test.out.stdout 2>>test.out.stderr &
   PID=$!
   kill -0 $PID || exit 1
-  python test_forward_all.py
+  python3 test_forward_all.py
   kill $PID
   wait $PID
 
@@ -68,7 +68,7 @@ runtests() {
     >>test.out.stdout 2>>test.out.stderr &
   PID=$!
   kill -0 $PID || exit 1
-  python test_server_id.py
+  python3 test_server_id.py
   kill $PID
   wait $PID
 
@@ -84,7 +84,7 @@ runtests() {
     >>test.out.stdout 2>>test.out.stderr &
   PID=$!
   kill -0 $PID || exit 1
-  python test_mimemap.py
+  python3 test_mimemap.py
   kill $PID
   wait $PID
 
@@ -93,7 +93,7 @@ runtests() {
     >>test.out.stdout 2>>test.out.stderr &
   PID=$!
   kill -0 $PID || exit 1
-  python test_no_listing.py
+  python3 test_no_listing.py
   kill $PID
   wait $PID
 
@@ -102,7 +102,7 @@ runtests() {
     >>test.out.stdout 2>>test.out.stderr &
   PID=$!
   kill -0 $PID || exit 1
-  python test_timeout.py
+  python3 test_timeout.py
   kill $PID
   wait $PID
 
@@ -115,7 +115,7 @@ runtests() {
     >>test.out.stdout 2>>test.out.stderr &
   PID=$!
   kill -0 $PID || exit 1
-  python test_auth.py
+  python3 test_auth.py
   kill $PID
   wait $PID
 
diff --git a/devel/test_forward.py b/devel/test_forward.py
index 1d1cdc3..d946ab9 100755
--- a/devel/test_forward.py
+++ b/devel/test_forward.py
@@ -1,24 +1,23 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This is run by the "run-tests" script.
 import unittest
 from test import TestHelper, Conn, parse
 
 class TestForward(TestHelper):
     def test_forward_root(self):
-        resp = Conn().get("/", req_hdrs = { "Host": "example.com" })
+        resp = self.get('/', req_hdrs={'Host': 'example.com'})
         status, hdrs, body = parse(resp)
         self.assertContains(status, "301 Moved Permanently")
         expect = "http://www.example.com/"
-        self.assertEquals(hdrs["Location"], expect)
+        self.assertEqual(hdrs["Location"], expect)
         self.assertContains(body, expect)
 
     def test_forward_relative(self):
-        resp = Conn().get("/foo/bar",
-                          req_hdrs = { "Host": "secure.example.com" })
+        resp = self.get('/foo/bar', req_hdrs={'Host': 'secure.example.com'})
         status, hdrs, body = parse(resp)
         self.assertContains(status, "301 Moved Permanently")
         expect = "https://www.example.com/secure/foo/bar"
-        self.assertEquals(hdrs["Location"], expect)
+        self.assertEqual(hdrs["Location"], expect)
         self.assertContains(body, expect)
 
 if __name__ == '__main__':
diff --git a/devel/test_forward_all.py b/devel/test_forward_all.py
index fc0f068..1c44057 100755
--- a/devel/test_forward_all.py
+++ b/devel/test_forward_all.py
@@ -1,24 +1,24 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This is run by the "run-tests" script.
 import unittest
 from test import TestHelper, Conn, parse
 
 class TestForwardAll(TestHelper):
     def test_forward_root(self):
-        resp = Conn().get("/", req_hdrs = { "Host": "not-example.com" })
+        resp = self.get('/', req_hdrs={'Host': 'not-example.com'})
         status, hdrs, body = parse(resp)
         self.assertContains(status, "301 Moved Permanently")
         expect = "http://catchall.example.com/"
-        self.assertEquals(hdrs["Location"], expect)
+        self.assertEqual(hdrs["Location"], expect)
         self.assertContains(body, expect)
 
     def test_forward_relative(self):
-        resp = Conn().get("/foo/bar",
-                          req_hdrs = { "Host": "still-not.example.com" })
+        resp = self.get('/foo/bar',
+                req_hdrs={'Host': 'still-not.example.com'})
         status, hdrs, body = parse(resp)
         self.assertContains(status, "301 Moved Permanently")
         expect = "http://catchall.example.com/foo/bar"
-        self.assertEquals(hdrs["Location"], expect)
+        self.assertEqual(hdrs["Location"], expect)
         self.assertContains(body, expect)
 
 if __name__ == '__main__':
diff --git a/devel/test_mimemap.py b/devel/test_mimemap.py
index 8eb3ccc..9b85626 100755
--- a/devel/test_mimemap.py
+++ b/devel/test_mimemap.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This is run by the "run-tests" script.
 import unittest
 import os
@@ -6,14 +6,15 @@ from test import WWWROOT, TestHelper, Conn, parse
 
 class TestMimemap(TestHelper):
     def setUp(self):
-        self.data = "hello\n"
+        self.data = b'hello\n'
         self.datalen = len(self.data)
         self.files = [ ("test-file.a1",    "test/type1"),
                        ("test-file.ap2",   "test/type2"),
                        ("test-file.app3",  "test/type3"),
                        ("test-file.appp4", "test/default") ]
         for fn, _ in self.files:
-            open(WWWROOT + "/" + fn, "w").write(self.data)
+            with open(WWWROOT + "/" + fn, 'wb') as f:
+                f.write(self.data)
 
     def tearDown(self):
         for fn, _ in self.files:
@@ -21,14 +22,14 @@ class TestMimemap(TestHelper):
 
     def get_helper(self, idx):
         fn, content_type = self.files[idx]
-        resp = Conn().get("/" + fn)
+        resp = self.get("/" + fn)
         status, hdrs, body = parse(resp)
         self.assertContains(status, "200 OK")
-        self.assertEquals(hdrs["Accept-Ranges"], "bytes")
-        self.assertEquals(hdrs["Content-Length"], str(self.datalen))
-        self.assertEquals(hdrs["Content-Type"], content_type)
+        self.assertEqual(hdrs["Accept-Ranges"], "bytes")
+        self.assertEqual(hdrs["Content-Length"], str(self.datalen))
+        self.assertEqual(hdrs["Content-Type"], content_type)
         self.assertContains(hdrs["Server"], "darkhttpd/")
-        self.assertEquals(body, self.data)
+        self.assertEqual(body, self.data)
 
     def test_get_1(self): self.get_helper(0)
     def test_get_2(self): self.get_helper(1)
diff --git a/devel/test_no_listing.py b/devel/test_no_listing.py
index 2bd2f06..7912bd1 100755
--- a/devel/test_no_listing.py
+++ b/devel/test_no_listing.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This is run by the "run-tests" script.
 import unittest
 from test import TestHelper, Conn, parse
diff --git a/devel/test_server_id.py b/devel/test_server_id.py
index ea74fe6..bfac5c2 100755
--- a/devel/test_server_id.py
+++ b/devel/test_server_id.py
@@ -1,15 +1,15 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This is run by the "run-tests" script.
 import unittest
 from test import TestHelper, Conn, parse
 
 class TestForward(TestHelper):
     def test_no_server_id(self):
-        resp = Conn().get("/", method = 'BOGUS')
+        resp = self.get('/', method = 'BOGUS')
         status, hdrs, body = parse(resp)
         self.assertContains(status, "400 Bad Request")
-        self.assertFalse(hdrs.has_key("Server"))
-        self.assertFalse("Generated by darkhttpd/" in body)
+        self.assertFalse('Server' in hdrs)
+        self.assertFalse(b'Generated by darkhttpd/' in body)
 
 if __name__ == '__main__':
     unittest.main()
diff --git a/devel/test_timeout.py b/devel/test_timeout.py
index ae32298..0109d5a 100755
--- a/devel/test_timeout.py
+++ b/devel/test_timeout.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This is run by the "run-tests" script.
 import unittest
 import signal
@@ -14,7 +14,8 @@ class TestTimeout(unittest.TestCase):
         # Expect to get EOF before the alarm fires.
         ret = s.recv(1024)
         signal.alarm(0)
-        self.assertEquals(ret, '')
+        s.close()
+        self.assertEqual(ret, b'')
 
 if __name__ == '__main__':
     unittest.main()