diff --git a/tox.ini b/tox.ini
index 89f3abd..45bed02 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,6 +4,7 @@ isolated_build = true
 
 [testenv]
 description = Run the tests
+require_locked_deps = true
 deps =
     pytest
     pytest-cov
@@ -13,6 +14,7 @@ commands =
 
 [testenv:static]
 description = Static formatting and quality enforcement
+require_locked_deps = true
 basepython = python3.8
 ignore_errors = true
 deps =
@@ -30,6 +32,7 @@ commands =
 
 [testenv:static-tests]
 description = Static formatting and quality enforcement for the tests
+require_locked_deps = true
 basepython = python3.8
 ingore_errors = true
 deps =
@@ -47,6 +50,7 @@ commands =
 
 [testenv:security]
 description = Security checks
+require_locked_deps = true
 basepython = python3.8
 ignore_errors = true
 skip_install = true