diff --git a/tox.ini b/tox.ini
index 47ef5ebc29..fc882cf236 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,10 +1,8 @@
 [tox]
 envlist = pep8,py39,bashate,pip-check-reqs
 minversion = 3.18.0
-ignore_basepython_conflict = True
 
 [tempestenv]
-basepython = python3
 sitepackages = False
 setenv =
     VIRTUAL_ENV={envdir}
@@ -15,7 +13,6 @@ deps =
     -r{toxinidir}/requirements.txt
 
 [testenv]
-basepython = python3
 setenv =
     VIRTUAL_ENV={envdir}
     OS_LOG_CAPTURE=1
@@ -72,7 +69,6 @@ commands = oslo_debug_helper -t tempest/tests {posargs}
 [testenv:all]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 # 'all' includes slow tests
 setenv =
     {[tempestenv]setenv}
@@ -93,7 +89,6 @@ sitepackages = True
 # 'all' includes slow tests
 setenv =
     {[tempestenv]setenv}
-basepython = {[tempestenv]basepython}
 deps = {[tempestenv]deps}
 commands =
     echo "WARNING: The all-plugin env is deprecated and will be removed"
@@ -106,7 +101,6 @@ sitepackages = True
 # 'all' includes slow tests
 setenv =
     {[tempestenv]setenv}
-basepython = {[tempestenv]basepython}
 deps = {[tempestenv]deps}
 commands =
     find . -type f -name "*.pyc" -delete
@@ -115,7 +109,6 @@ commands =
 [testenv:full]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 # The regex below is used to select which tests to run and exclude the slow tag:
@@ -129,7 +122,6 @@ commands =
 [testenv:integrated-full]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 # The regex below is used to select which tests to run. It exclude the extra
@@ -146,7 +138,6 @@ commands =
 [testenv:extra-tests]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 # The regex below is used to select extra tests mentioned in
@@ -161,7 +152,6 @@ commands =
 [testenv:full-parallel]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 # But exlcude the extra tests mentioned in tools/tempest-extra-tests-list.txt
@@ -173,7 +163,6 @@ commands =
 [testenv:api-microversion-tests]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex = '(^tempest\.api\.compute)|(^tempest\.api\.volume)'
@@ -186,7 +175,6 @@ commands =
 [testenv:integrated-network]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex1 = '(?!.*\[.*\bslow\b.*\])(^tempest\.api)'
@@ -201,7 +189,6 @@ commands =
 [testenv:integrated-compute]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex1 = '(?!.*\[.*\bslow\b.*\])(^tempest\.api)'
@@ -216,7 +203,6 @@ commands =
 [testenv:integrated-placement]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex1 = '(?!.*\[.*\bslow\b.*\])(^tempest\.api)'
@@ -231,7 +217,6 @@ commands =
 [testenv:integrated-storage]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex1 = '(?!.*\[.*\bslow\b.*\])(^tempest\.api)'
@@ -246,7 +231,6 @@ commands =
 [testenv:integrated-object-storage]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex1 = '(?!.*\[.*\bslow\b.*\])(^tempest\.api)'
@@ -261,7 +245,6 @@ commands =
 [testenv:full-serial]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex = '(?!.*\[.*\bslow\b.*\])(^tempest\.(api|scenario|serial_tests))'
@@ -275,7 +258,6 @@ commands =
 [testenv:scenario]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex = '(^tempest\.scenario)'
@@ -287,7 +269,6 @@ commands =
 [testenv:smoke]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex = '\[.*\bsmoke\b.*\]'
@@ -298,7 +279,6 @@ commands =
 [testenv:smoke-serial]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex = '\[.*\bsmoke\b.*\]'
@@ -312,7 +292,6 @@ commands =
 [testenv:slow-serial]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex = '\[.*\bslow\b.*\]'
@@ -324,7 +303,6 @@ commands =
 [testenv:slow]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 # The regex below is used to select the slow tagged tests:
@@ -336,7 +314,6 @@ commands =
 [testenv:multinode]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 # The regex below is used to select the multinode and smoke tagged tests
@@ -348,7 +325,6 @@ commands =
 [testenv:ipv6-only]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex = '\[.*\bsmoke|ipv6|test_network_v6\b.*\]'
@@ -369,7 +345,6 @@ commands = {posargs}
 [testenv:venv-tempest]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 commands = {posargs}
@@ -513,7 +488,6 @@ commands =
 [testenv:stestr-master]
 envdir = .tox/tempest
 sitepackages = {[tempestenv]sitepackages}
-basepython = {[tempestenv]basepython}
 setenv = {[tempestenv]setenv}
 deps = {[tempestenv]deps}
 regex = '\[.*\bsmoke\b.*\]'