diff --git a/tools/dev_constraints.txt b/tools/dev_requirements.txt
similarity index 96%
rename from tools/dev_constraints.txt
rename to tools/dev_requirements.txt
index 8a45a7949..d4ba3789b 100644
--- a/tools/dev_constraints.txt
+++ b/tools/dev_requirements.txt
@@ -1,7 +1,7 @@
 # Specifies Python package versions for development and building Docker images.
 # It includes in particular packages not specified in letsencrypt-auto's requirements file.
-# Some dev package versions specified here may be overridden by higher level constraints
-# files during tests (eg. tools/certbot_requirements.txt).
+# Some dev package versions specified here may be overridden by higher level
+# requirements files during tests (eg. tools/certbot_requirements.txt).
 alabaster==0.7.10
 apacheconfig==0.3.2
 apipkg==1.4
diff --git a/tools/pip_install.py b/tools/pip_install.py
index cde0b61ef..305e628bc 100755
--- a/tools/pip_install.py
+++ b/tools/pip_install.py
@@ -1,10 +1,10 @@
 #!/usr/bin/env python
 # pip installs packages using pinned package versions. If CERTBOT_OLDEST is set
 # to 1, a combination of tools/oldest_constraints.txt,
-# tools/dev_constraints.txt, and local-oldest-requirements.txt contained in the
+# tools/dev_requirements.txt, and local-oldest-requirements.txt contained in the
 # top level of the package's directory is used, otherwise, a combination of
-# certbot-auto's requirements file and tools/dev_constraints.txt is used. The
-# other file always takes precedence over tools/dev_constraints.txt. If
+# certbot-auto's requirements file and tools/dev_requirements.txt is used. The
+# other file always takes precedence over tools/dev_requirements.txt. If
 # CERTBOT_OLDEST is set, this script must be run with `-e <package-name>` and
 # no other arguments.
 
@@ -74,11 +74,11 @@ def merge_requirements(tools_path, requirements, test_constraints, all_constrain
     # Indeed version retained for a given package will be the last version
     # found when following all requirements in the given order.
     # Here is the order by increasing priority:
-    # 1) The general development constraints (tools/dev_constraints.txt)
+    # 1) The general development constraints (tools/dev_requirements.txt)
     # 2) The general tests constraints (oldest_requirements.txt or
     #    certbot_requirements.txt + pipstrap's constraints for the normal processing)
     # 3) The local requirement file, typically local-oldest-requirement in oldest tests
-    files = [os.path.join(tools_path, 'dev_constraints.txt'), test_constraints]
+    files = [os.path.join(tools_path, 'dev_requirements.txt'), test_constraints]
     if requirements:
         files.append(requirements)
     merged_requirements = merge_module.main(*files)
diff --git a/tools/snap/generate_dnsplugins_all.sh b/tools/snap/generate_dnsplugins_all.sh
index 66607d9e1..5f3c49104 100755
--- a/tools/snap/generate_dnsplugins_all.sh
+++ b/tools/snap/generate_dnsplugins_all.sh
@@ -9,7 +9,7 @@ for PLUGIN_PATH in "${CERTBOT_DIR}"/certbot-dns-*; do
   bash "${CERTBOT_DIR}"/tools/snap/generate_dnsplugins_snapcraft.sh $PLUGIN_PATH
   bash "${CERTBOT_DIR}"/tools/snap/generate_dnsplugins_postrefreshhook.sh $PLUGIN_PATH
   # Create constraints file
-  "${CERTBOT_DIR}"/tools/merge_requirements.py tools/dev_constraints.txt \
+  "${CERTBOT_DIR}"/tools/merge_requirements.py tools/dev_requirements.txt \
     <("${CERTBOT_DIR}"/tools/strip_hashes.py tools/certbot_requirements.txt) \
     <("${CERTBOT_DIR}"/tools/strip_hashes.py tools/pipstrap_constraints.txt) \
     > "${PLUGIN_PATH}"/snap-constraints.txt