fix tox

Author: imabhichow

DynamoDbEncryption/runtimes/python/tox.ini

@@ -18,13 +18,18 @@ allowlist_externals = poetry,ruff,black
 passenv = AWS_*
 commands_pre =
     poetry lock
-    dafnytests,unit,integ: poetry install --with test
-    legacyinteg: poetry install --with test --extras legacy-ddbec
+    poetry install --with test
 commands =
     dafnytests: {[testenv:base-command]commands} test/internaldafny/
     unit: {[testenv:base-command]commands} test/unit/
     integ: {[testenv:base-command]commands} test/integ/encrypted/
-    legacyinteg: {[testenv:base-command]commands} test/integ/legacy/
+
+[testenv:legacyinteg]
+description = Run integ tests for legacy extern compatibility
+commands_pre =
+    poetry lock
+    poetry install --with test --extras legacy-ddbec
+commands = {[testenv:base-command]commands} test/integ/legacy/
 
 [testenv:encrypted-interface-coverage]
 description = Run integ + unit tests for encrypted interfaces with coverage