diff --git a/testing/btest/coverage/find-bro-logs.test b/testing/btest/coverage/find-bro-logs.test
index 82b5df2445..01e822deef 100644
--- a/testing/btest/coverage/find-bro-logs.test
+++ b/testing/btest/coverage/find-bro-logs.test
@@ -4,7 +4,7 @@
 #
 # If this test fails, then the "Log Files" documentation page should be updated.
 
-# @TEST-REQUIRES: which python
+# @TEST-REQUIRES: which python3
 # @TEST-EXEC: bash %INPUT
 # @TEST-EXEC: btest-diff out
 
@@ -15,7 +15,7 @@ if [ ! -d "${BROSCRIPTS}" ]; then
     exit 1
 fi
 
-python find_logs.py "${BROSCRIPTS}" | sort > out
+python3 find_logs.py "${BROSCRIPTS}" | sort > out
 
 @TEST-START-FILE find_logs.py
 import os, sys
diff --git a/testing/btest/scripts/base/utils/active-http.test b/testing/btest/scripts/base/utils/active-http.test
index ff80dc5bf2..36f5ec9eab 100644
--- a/testing/btest/scripts/base/utils/active-http.test
+++ b/testing/btest/scripts/base/utils/active-http.test
@@ -1,7 +1,7 @@
-# @TEST-REQUIRES: which python
+# @TEST-REQUIRES: which python3
 # @TEST-REQUIRES: which curl
 #
-# @TEST-EXEC: btest-bg-run httpd python $SCRIPTS/httpd.py --max 2 --addr=127.0.0.1
+# @TEST-EXEC: btest-bg-run httpd python3 $SCRIPTS/httpd.py --max 2 --addr=127.0.0.1
 # @TEST-EXEC: sleep 3
 # @TEST-EXEC: btest-bg-run zeek zeek -b %INPUT
 # @TEST-EXEC: btest-bg-wait 15
diff --git a/testing/scripts/coverage-calc b/testing/scripts/coverage-calc
index 3645f57144..016cfff5c4 100755
--- a/testing/scripts/coverage-calc
+++ b/testing/scripts/coverage-calc
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 # This script aggregates many files containing Zeek script coverage information
 # into a single file and reports the overall coverage information. Usage:
diff --git a/testing/scripts/httpd.py b/testing/scripts/httpd.py
index 3576f09d1a..c5cc4507b7 100755
--- a/testing/scripts/httpd.py
+++ b/testing/scripts/httpd.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 try:
     # Python 2