diff --git a/.github/sync-repo-settings.yaml b/.github/sync-repo-settings.yaml
index bfde18cc0..ecc31984d 100644
--- a/.github/sync-repo-settings.yaml
+++ b/.github/sync-repo-settings.yaml
@@ -11,8 +11,6 @@ branchProtectionRules:
     - 'Kokoro - Against Pub/Sub Lite samples'
     - 'cla/google'
     - 'Samples - Lint'
-    - 'Samples - Python 3.7'
-    - 'Samples - Python 3.8'
     - 'Samples - Python 3.9'
     - 'Samples - Python 3.10'
     - 'Samples - Python 3.11'
@@ -21,8 +19,6 @@ branchProtectionRules:
     - 'docs'
     - 'docfx'
     - 'lint'
-    - 'unit (3.7)'
-    - 'unit (3.8)'
     - 'unit (3.9)'
     - 'unit (3.10)'
     - 'unit (3.11)'
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 0d0fdb861..c5ee98837 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Setup Python
       uses: actions/setup-python@v6
       with:
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Setup Python
       uses: actions/setup-python@v6
       with:
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 04e411304..9fb410b81 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
+        python: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
     steps:
     - name: Checkout
       uses: actions/checkout@v4
diff --git a/.kokoro/samples/python3.7/common.cfg b/.kokoro/samples/python3.7/common.cfg
deleted file mode 100644
index 9156c5975..000000000
--- a/.kokoro/samples/python3.7/common.cfg
+++ /dev/null
@@ -1,40 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Build logs will be here
-action {
-  define_artifacts {
-    regex: "**/*sponge_log.xml"
-  }
-}
-
-# Specify which tests to run
-env_vars: {
-    key: "RUN_TESTS_SESSION"
-    value: "py-3.7"
-}
-
-# Declare build specific Cloud project.
-env_vars: {
-    key: "BUILD_SPECIFIC_GCLOUD_PROJECT"
-    value: "python-docs-samples-tests-py37"
-}
-
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/python-pubsub/.kokoro/test-samples.sh"
-}
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-    key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/python-samples-testing-docker"
-}
-
-# Download secrets for samples
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/python-docs-samples"
-
-# Download trampoline resources.
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
-
-# Use the trampoline script to run in docker.
-build_file: "python-pubsub/.kokoro/trampoline_v2.sh"
\ No newline at end of file
diff --git a/.kokoro/samples/python3.7/continuous.cfg b/.kokoro/samples/python3.7/continuous.cfg
deleted file mode 100644
index a1c8d9759..000000000
--- a/.kokoro/samples/python3.7/continuous.cfg
+++ /dev/null
@@ -1,6 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-env_vars: {
-    key: "INSTALL_LIBRARY_FROM_SOURCE"
-    value: "True"
-}
\ No newline at end of file
diff --git a/.kokoro/samples/python3.7/periodic-head.cfg b/.kokoro/samples/python3.7/periodic-head.cfg
deleted file mode 100644
index f9cfcd33e..000000000
--- a/.kokoro/samples/python3.7/periodic-head.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-env_vars: {
-    key: "INSTALL_LIBRARY_FROM_SOURCE"
-    value: "True"
-}
-
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/python-pubsub/.kokoro/test-samples-against-head.sh"
-}
diff --git a/.kokoro/samples/python3.7/periodic.cfg b/.kokoro/samples/python3.7/periodic.cfg
deleted file mode 100644
index 71cd1e597..000000000
--- a/.kokoro/samples/python3.7/periodic.cfg
+++ /dev/null
@@ -1,6 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-env_vars: {
-    key: "INSTALL_LIBRARY_FROM_SOURCE"
-    value: "False"
-}
diff --git a/.kokoro/samples/python3.7/presubmit.cfg b/.kokoro/samples/python3.7/presubmit.cfg
deleted file mode 100644
index a1c8d9759..000000000
--- a/.kokoro/samples/python3.7/presubmit.cfg
+++ /dev/null
@@ -1,6 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-env_vars: {
-    key: "INSTALL_LIBRARY_FROM_SOURCE"
-    value: "True"
-}
\ No newline at end of file
diff --git a/.kokoro/samples/python3.8/common.cfg b/.kokoro/samples/python3.8/common.cfg
deleted file mode 100644
index 5922bef07..000000000
--- a/.kokoro/samples/python3.8/common.cfg
+++ /dev/null
@@ -1,40 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Build logs will be here
-action {
-  define_artifacts {
-    regex: "**/*sponge_log.xml"
-  }
-}
-
-# Specify which tests to run
-env_vars: {
-    key: "RUN_TESTS_SESSION"
-    value: "py-3.8"
-}
-
-# Declare build specific Cloud project.
-env_vars: {
-    key: "BUILD_SPECIFIC_GCLOUD_PROJECT"
-    value: "python-docs-samples-tests-py38"
-}
-
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/python-pubsub/.kokoro/test-samples.sh"
-}
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-    key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/python-samples-testing-docker"
-}
-
-# Download secrets for samples
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/python-docs-samples"
-
-# Download trampoline resources.
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
-
-# Use the trampoline script to run in docker.
-build_file: "python-pubsub/.kokoro/trampoline_v2.sh"
\ No newline at end of file
diff --git a/.kokoro/samples/python3.8/continuous.cfg b/.kokoro/samples/python3.8/continuous.cfg
deleted file mode 100644
index a1c8d9759..000000000
--- a/.kokoro/samples/python3.8/continuous.cfg
+++ /dev/null
@@ -1,6 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-env_vars: {
-    key: "INSTALL_LIBRARY_FROM_SOURCE"
-    value: "True"
-}
\ No newline at end of file
diff --git a/.kokoro/samples/python3.8/periodic-head.cfg b/.kokoro/samples/python3.8/periodic-head.cfg
deleted file mode 100644
index f9cfcd33e..000000000
--- a/.kokoro/samples/python3.8/periodic-head.cfg
+++ /dev/null
@@ -1,11 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-env_vars: {
-    key: "INSTALL_LIBRARY_FROM_SOURCE"
-    value: "True"
-}
-
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/python-pubsub/.kokoro/test-samples-against-head.sh"
-}
diff --git a/.kokoro/samples/python3.8/periodic.cfg b/.kokoro/samples/python3.8/periodic.cfg
deleted file mode 100644
index 71cd1e597..000000000
--- a/.kokoro/samples/python3.8/periodic.cfg
+++ /dev/null
@@ -1,6 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-env_vars: {
-    key: "INSTALL_LIBRARY_FROM_SOURCE"
-    value: "False"
-}
diff --git a/.kokoro/samples/python3.8/presubmit.cfg b/.kokoro/samples/python3.8/presubmit.cfg
deleted file mode 100644
index a1c8d9759..000000000
--- a/.kokoro/samples/python3.8/presubmit.cfg
+++ /dev/null
@@ -1,6 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-env_vars: {
-    key: "INSTALL_LIBRARY_FROM_SOURCE"
-    value: "True"
-}
\ No newline at end of file
diff --git a/.librarian/generator-input/librarian.py b/.librarian/generator-input/librarian.py
index 5e6af7955..612003377 100644
--- a/.librarian/generator-input/librarian.py
+++ b/.librarian/generator-input/librarian.py
@@ -326,7 +326,7 @@
     if count < 1:
         raise Exception(".coveragerc replacement failed.")
 
-    s.move([library], excludes=["noxfile.py", "README.rst", "docs/**/*", "setup.py", "testing/constraints-3.7.txt", "testing/constraints-3.8.txt"])
+    s.move([library], excludes=["noxfile.py", "README.rst", "docs/**/*", "setup.py"])
 s.remove_staging_dirs()
 
 # ----------------------------------------------------------------------------
diff --git a/.librarian/generator-input/noxfile.py b/.librarian/generator-input/noxfile.py
index fd552166c..170360d6f 100644
--- a/.librarian/generator-input/noxfile.py
+++ b/.librarian/generator-input/noxfile.py
@@ -37,8 +37,6 @@
 DEFAULT_PYTHON_VERSION = "3.14"
 
 UNIT_TEST_PYTHON_VERSIONS: List[str] = [
-    "3.7",
-    "3.8",
     "3.9",
     "3.10",
     "3.11",
diff --git a/.librarian/generator-input/setup.py b/.librarian/generator-input/setup.py
index dd2809f82..761bc90ce 100644
--- a/.librarian/generator-input/setup.py
+++ b/.librarian/generator-input/setup.py
@@ -47,10 +47,8 @@
     "protobuf>=3.20.2,<7.0.0,!=4.21.0,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5",
     "grpc-google-iam-v1 >= 0.12.4, < 1.0.0",
     "grpcio-status >= 1.33.2",
-    "opentelemetry-api <= 1.22.0; python_version<='3.7'",
-    "opentelemetry-api >= 1.27.0; python_version>='3.8'",
-    "opentelemetry-sdk <= 1.22.0; python_version<='3.7'",
-    "opentelemetry-sdk >= 1.27.0; python_version>='3.8'",
+    "opentelemetry-api >= 1.27.0",
+    "opentelemetry-sdk >= 1.27.0",
 ]
 extras = {"libcst": "libcst >= 0.3.10"}
 url = "https://github.com/googleapis/python-pubsub"
@@ -82,8 +80,6 @@
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
@@ -97,7 +93,7 @@
     packages=packages,
     install_requires=dependencies,
     extras_require=extras,
-    python_requires=">=3.7",
+    python_requires=">=3.9",
     include_package_data=True,
     zip_safe=False,
 )
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 417b1e9f8..4e926536b 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -22,7 +22,7 @@ In order to add a feature:
   documentation.
 
 - The feature must work fully on the following CPython versions:
-  3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 3.13 and 3.14 on both UNIX and Windows.
+  3.9, 3.10, 3.11, 3.12, 3.13 and 3.14 on both UNIX and Windows.
 
 - The feature must not add unnecessary dependencies (where
   "unnecessary" is of course subjective, but new dependencies should
@@ -195,11 +195,11 @@ configure them just like the System Tests.
 
    # Run all tests in a folder
    $ cd samples/snippets
-   $ nox -s py-3.8
+   $ nox -s py-3.14
 
    # Run a single sample test
    $ cd samples/snippets
-   $ nox -s py-3.8 -- -k <name of test>
+   $ nox -s py-3.14 -- -k <name of test>
 
 ********************************************
 Note About ``README`` as it pertains to PyPI
@@ -221,8 +221,6 @@ Supported Python Versions
 
 We support:
 
--  `Python 3.7`_
--  `Python 3.8`_
 -  `Python 3.9`_
 -  `Python 3.10`_
 -  `Python 3.11`_
@@ -230,8 +228,6 @@ We support:
 -  `Python 3.13`_
 -  `Python 3.14`_
 
-.. _Python 3.7: https://docs.python.org/3.7/
-.. _Python 3.8: https://docs.python.org/3.8/
 .. _Python 3.9: https://docs.python.org/3.9/
 .. _Python 3.10: https://docs.python.org/3.10/
 .. _Python 3.11: https://docs.python.org/3.11/
diff --git a/README.rst b/README.rst
index 97010e998..86ea7e48e 100644
--- a/README.rst
+++ b/README.rst
@@ -1,7 +1,7 @@
 Python Client for Google Cloud Pub / Sub
 ========================================
 
-|GA| |pypi| |versions| 
+|GA| |pypi| |versions|
 
 `Google Cloud Pub / Sub`_ is a fully-managed real-time messaging service that
 allows you to send and receive messages between independent applications. You
@@ -60,11 +60,13 @@ dependencies.
 
 Supported Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^
-Python >= 3.7
+Python >= 3.9
 
 Deprecated Python Versions
 ^^^^^^^^^^^^^^^^^^^^^^^^^^
-Python <= 3.6.
+Python < 3.9
+
+The last version of this library compatible with Python 3.7 and 3.8 is google-cloud-pubsub==2.34.0.
 
 The last version of this library compatible with Python 2.7 is google-cloud-pubsub==1.7.0.
 
@@ -146,7 +148,7 @@ the topic, and subscribe to that, passing a callback function.
 
     with pubsub_v1.SubscriberClient() as subscriber:
         subscriber.create_subscription(
-            name=subscription_name, topic=topic_name)  
+            name=subscription_name, topic=topic_name)
         future = subscriber.subscribe(subscription_name, callback)
 
 The future returned by the call to ``subscriber.subscribe`` can be used to
@@ -190,7 +192,7 @@ For example, to use JSON Web Tokens, provide a `google.auth.jwt.Credentials`_ in
 
     # The same for the publisher, except that the "audience" claim needs to be adjusted
     publisher_audience = "https://pubsub.googleapis.com/google.pubsub.v1.Publisher"
-    credentials_pub = credentials.with_claims(audience=publisher_audience) 
+    credentials_pub = credentials.with_claims(audience=publisher_audience)
     publisher = pubsub_v1.PublisherClient(credentials=credentials_pub)
 
 .. _Credentials: https://google-auth.readthedocs.io/en/latest/reference/google.auth.credentials.html#google.auth.credentials.Credentials
diff --git a/librarian.py b/librarian.py
index 5e6af7955..ecaa36d0e 100644
--- a/librarian.py
+++ b/librarian.py
@@ -326,7 +326,15 @@
     if count < 1:
         raise Exception(".coveragerc replacement failed.")
 
-    s.move([library], excludes=["noxfile.py", "README.rst", "docs/**/*", "setup.py", "testing/constraints-3.7.txt", "testing/constraints-3.8.txt"])
+    s.move(
+        [library],
+        excludes=[
+            "noxfile.py",
+            "README.rst",
+            "docs/**/*",
+            "setup.py",
+        ],
+    )
 s.remove_staging_dirs()
 
 # ----------------------------------------------------------------------------
@@ -338,10 +346,10 @@
     samples=True,
     cov_level=99,
     versions=gcp.common.detect_versions(path="./google", default_first=True),
-    unit_test_python_versions=["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"],
+    unit_test_python_versions=["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"],
     unit_test_dependencies=["flaky"],
     system_test_python_versions=["3.12"],
-    system_test_external_dependencies=["psutil","flaky"],
+    system_test_external_dependencies=["psutil", "flaky"],
 )
 s.move(templated_files, excludes=[".coveragerc", ".github/**", "README.rst", "docs/**", ".kokoro/**"])
 
diff --git a/mypy.ini b/mypy.ini
index 574c5aed3..a3cb5c292 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1,3 +1,3 @@
 [mypy]
-python_version = 3.7
+python_version = 3.14
 namespace_packages = True
diff --git a/noxfile.py b/noxfile.py
index d1b3c15d1..d7fa4a7e8 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -41,8 +41,6 @@
 DEFAULT_PYTHON_VERSION = "3.14"
 
 UNIT_TEST_PYTHON_VERSIONS: List[str] = [
-    "3.7",
-    "3.8",
     "3.9",
     "3.10",
     "3.11",
diff --git a/pytest.ini b/pytest.ini
index a1f4f115e..41cad40d6 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -6,8 +6,6 @@ filterwarnings =
     ignore:.*custom tp_new.*in Python 3.14:DeprecationWarning
     # Remove once https://github.com/grpc/grpc/issues/35086 is fixed
     ignore:There is no current event loop:DeprecationWarning:grpc.aio._channel
-    # Remove after support for Python 3.7 is dropped
-    ignore:After January 1, 2024, new releases of this library will drop support for Python 3.7:DeprecationWarning
     # Remove warning once https://github.com/googleapis/gapic-generator-python/issues/1938 is fixed
     ignore:The return_immediately flag is deprecated and should be set to False.:DeprecationWarning
     # Remove warning once https://github.com/googleapis/gapic-generator-python/issues/1939 is fixed
@@ -26,13 +24,5 @@ filterwarnings =
     ignore:The `credentials_file` argument is deprecated because of a potential security risk:DeprecationWarning
     ignore:You are using a Python version.*which Google will stop supporting in new releases of google\.api_core.*:FutureWarning
     ignore:You are using a non-supported Python version \(([\d\.]+)\)\. Google will not post any further updates to google\.api_core.*:FutureWarning
-    ignore:You are using a Python version \(([\d\.]+)\) past its end of life\. Google will update google\.api_core.*:FutureWarning
-    # Remove after support for Python 3.7 is dropped
-    ignore:You are using a non-supported Python version \(3\.7:FutureWarning
-    # Remove after support for Python 3.8 is dropped
-    ignore:You are using a non-supported Python version \(3\.8:DeprecationWarning
-    ignore:You are using a non-supported Python version \(3\.8:FutureWarning
-    # Remove after support for Python 3.9 is dropped
-    ignore:You are using a Python version \(3\.9:FutureWarning
-    # Remove after support for Python 3.10 is dropped
-    ignore:.*You are using a Python version \(3\.10:FutureWarning
+    # These google library EOL warnings for Python versions don't matter for the purposes of a test.
+    ignore::FutureWarning:google.*:
diff --git a/samples/snippets/noxfile.py b/samples/snippets/noxfile.py
index c326375be..50f2fce56 100644
--- a/samples/snippets/noxfile.py
+++ b/samples/snippets/noxfile.py
@@ -87,9 +87,8 @@ def get_pytest_env_vars() -> Dict[str, str]:
     return ret
 
 
-# DO NOT EDIT - automatically generated.
 # All versions used to test samples.
-ALL_VERSIONS = ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+ALL_VERSIONS = ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
 
 # Any default versions that should be ignored.
 IGNORED_VERSIONS = TEST_CONFIG["ignored_versions"]
diff --git a/samples/snippets/requirements-test.txt b/samples/snippets/requirements-test.txt
index 7659e3676..a4969d6fe 100644
--- a/samples/snippets/requirements-test.txt
+++ b/samples/snippets/requirements-test.txt
@@ -1,9 +1,6 @@
 backoff==2.2.1
-pytest===7.4.4; python_version == '3.7'
-pytest===8.3.5; python_version == '3.8'
-pytest==8.4.2; python_version >= '3.9'
+pytest==8.4.2
 mock==5.2.0
 flaky==3.8.1
-google-cloud-bigquery===3.30.0; python_version <= '3.8'
-google-cloud-bigquery==3.38.0; python_version >= '3.9'
+google-cloud-bigquery==3.38.0
 google-cloud-storage==3.4.0
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index 63a78cd67..997d5a201 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,13 +1,7 @@
 google-cloud-pubsub==2.31.1
 avro==1.12.0
-protobuf===4.24.4; python_version == '3.7'
-protobuf===5.29.4; python_version == '3.8'
-protobuf==6.32.1; python_version >= '3.9'
+protobuf==6.32.1
 avro==1.12.0
-opentelemetry-api===1.22.0; python_version == '3.7'
-opentelemetry-sdk===1.22.0; python_version == '3.7'
-opentelemetry-api===1.33.1; python_version == '3.8'
-opentelemetry-sdk===1.33.1; python_version == '3.8'
-opentelemetry-api==1.37.0; python_version >= '3.9'
-opentelemetry-sdk==1.37.0; python_version >= '3.9'
+opentelemetry-api==1.37.0
+opentelemetry-sdk==1.37.0
 opentelemetry-exporter-gcp-trace==1.9.0
diff --git a/scripts/readme-gen/templates/install_deps.tmpl.rst b/scripts/readme-gen/templates/install_deps.tmpl.rst
index 6f069c6c8..f21db80c4 100644
--- a/scripts/readme-gen/templates/install_deps.tmpl.rst
+++ b/scripts/readme-gen/templates/install_deps.tmpl.rst
@@ -12,7 +12,7 @@ Install Dependencies
    .. _Python Development Environment Setup Guide:
        https://cloud.google.com/python/setup
 
-#. Create a virtualenv. Samples are compatible with Python 3.7+.
+#. Create a virtualenv. Samples are compatible with Python 3.9+.
 
     .. code-block:: bash
 
diff --git a/setup.py b/setup.py
index 74a11ebf6..211a3306f 100644
--- a/setup.py
+++ b/setup.py
@@ -51,10 +51,8 @@
     "protobuf>=3.20.2,<7.0.0,!=4.21.0,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5",
     "grpc-google-iam-v1 >= 0.12.4, < 1.0.0",
     "grpcio-status >= 1.33.2",
-    "opentelemetry-api <= 1.22.0; python_version<='3.7'",
-    "opentelemetry-api >= 1.27.0; python_version>='3.8'",
-    "opentelemetry-sdk <= 1.22.0; python_version<='3.7'",
-    "opentelemetry-sdk >= 1.27.0; python_version>='3.8'",
+    "opentelemetry-api >= 1.27.0",
+    "opentelemetry-sdk >= 1.27.0",
 ]
 extras = {"libcst": "libcst >= 0.3.10"}
 url = "https://github.com/googleapis/python-pubsub"
@@ -86,8 +84,6 @@
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
@@ -101,7 +97,7 @@
     packages=packages,
     install_requires=dependencies,
     extras_require=extras,
-    python_requires=">=3.7",
+    python_requires=">=3.9",
     include_package_data=True,
     zip_safe=False,
 )
diff --git a/testing/constraints-3.10.txt b/testing/constraints-3.10.txt
index ef1c92fff..cc0b74a08 100644
--- a/testing/constraints-3.10.txt
+++ b/testing/constraints-3.10.txt
@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 # This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
-google-api-core
-google-auth
-grpcio
-proto-plus
-protobuf
-grpc-google-iam-v1
+google-api-core>=2
+google-auth>=2
+grpcio>=1
+proto-plus>=1
+protobuf>=6
+grpc-google-iam-v1>=0
diff --git a/testing/constraints-3.11.txt b/testing/constraints-3.11.txt
index ef1c92fff..cc0b74a08 100644
--- a/testing/constraints-3.11.txt
+++ b/testing/constraints-3.11.txt
@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 # This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
-google-api-core
-google-auth
-grpcio
-proto-plus
-protobuf
-grpc-google-iam-v1
+google-api-core>=2
+google-auth>=2
+grpcio>=1
+proto-plus>=1
+protobuf>=6
+grpc-google-iam-v1>=0
diff --git a/testing/constraints-3.12.txt b/testing/constraints-3.12.txt
index ef1c92fff..cc0b74a08 100644
--- a/testing/constraints-3.12.txt
+++ b/testing/constraints-3.12.txt
@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 # This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
-google-api-core
-google-auth
-grpcio
-proto-plus
-protobuf
-grpc-google-iam-v1
+google-api-core>=2
+google-auth>=2
+grpcio>=1
+proto-plus>=1
+protobuf>=6
+grpc-google-iam-v1>=0
diff --git a/testing/constraints-3.13.txt b/testing/constraints-3.13.txt
index 2ae5a677e..cc0b74a08 100644
--- a/testing/constraints-3.13.txt
+++ b/testing/constraints-3.13.txt
@@ -1,10 +1,6 @@
-# We use the constraints file for the latest Python version
-# (currently this file) to check that the latest
-# major versions of dependencies are supported in setup.py.
+# -*- coding: utf-8 -*-
+# This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
-# Require the latest major version be installed for each dependency.
-# e.g., if setup.py has "google-cloud-foo >= 1.14.0, < 2.0.0",
-# Then this file should have google-cloud-foo>=1
 google-api-core>=2
 google-auth>=2
 grpcio>=1
diff --git a/testing/constraints-3.14.txt b/testing/constraints-3.14.txt
index 2ae5a677e..cc0b74a08 100644
--- a/testing/constraints-3.14.txt
+++ b/testing/constraints-3.14.txt
@@ -1,10 +1,6 @@
-# We use the constraints file for the latest Python version
-# (currently this file) to check that the latest
-# major versions of dependencies are supported in setup.py.
+# -*- coding: utf-8 -*-
+# This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
-# Require the latest major version be installed for each dependency.
-# e.g., if setup.py has "google-cloud-foo >= 1.14.0, < 2.0.0",
-# Then this file should have google-cloud-foo>=1
 google-api-core>=2
 google-auth>=2
 grpcio>=1
diff --git a/testing/constraints-3.7.txt b/testing/constraints-3.7.txt
deleted file mode 100644
index 08db5de87..000000000
--- a/testing/constraints-3.7.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-# This constraints file is used to check that lower bounds
-# are correct in setup.py
-# List all library dependencies and extras in this file.
-# Pin the version to the lower bound.
-# e.g., if setup.py has "google-cloud-foo >= 1.14.0, < 2.0.0dev",
-# Then this file should have google-cloud-foo==1.14.0
-google-api-core==1.34.0
-google-auth==2.14.1
-proto-plus==1.22.0
-protobuf==3.20.2
-grpc-google-iam-v1==0.12.4
-grpcio==1.51.3
-grpcio-status==1.33.2
diff --git a/testing/constraints-3.8.txt b/testing/constraints-3.8.txt
deleted file mode 100644
index 30520e2d0..000000000
--- a/testing/constraints-3.8.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- coding: utf-8 -*-
-# This constraints file is required for unit tests.
-# List all library dependencies and extras in this file.
-google-api-core==1.34.0
-proto-plus
-protobuf
-grpc-google-iam-v1
diff --git a/testing/constraints-3.9.txt b/testing/constraints-3.9.txt
index ef1c92fff..cc0b74a08 100644
--- a/testing/constraints-3.9.txt
+++ b/testing/constraints-3.9.txt
@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 # This constraints file is required for unit tests.
 # List all library dependencies and extras in this file.
-google-api-core
-google-auth
-grpcio
-proto-plus
-protobuf
-grpc-google-iam-v1
+google-api-core>=2
+google-auth>=2
+grpcio>=1
+proto-plus>=1
+protobuf>=6
+grpc-google-iam-v1>=0
diff --git a/tests/system.py b/tests/system.py
index e1af74402..9db2a5e12 100644
--- a/tests/system.py
+++ b/tests/system.py
@@ -20,16 +20,11 @@
 import operator as op
 import os
 import psutil
-import sys
 import threading
 import time
 from typing import Any, Callable, cast, TypeVar
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 from flaky import flaky
 import pytest
diff --git a/tests/unit/gapic/pubsub_v1/test_publisher.py b/tests/unit/gapic/pubsub_v1/test_publisher.py
index 978021fcd..33c3afef4 100644
--- a/tests/unit/gapic/pubsub_v1/test_publisher.py
+++ b/tests/unit/gapic/pubsub_v1/test_publisher.py
@@ -15,12 +15,8 @@
 #
 import os
 
-# try/except added for compatibility with python < 3.8
-try:
-    from unittest import mock
-    from unittest.mock import AsyncMock  # pragma: NO COVER
-except ImportError:  # pragma: NO COVER
-    import mock
+
+import mock
 
 import grpc
 from grpc.experimental import aio
diff --git a/tests/unit/gapic/pubsub_v1/test_schema_service.py b/tests/unit/gapic/pubsub_v1/test_schema_service.py
index f71b66805..76dd7b1f8 100644
--- a/tests/unit/gapic/pubsub_v1/test_schema_service.py
+++ b/tests/unit/gapic/pubsub_v1/test_schema_service.py
@@ -15,12 +15,7 @@
 #
 import os
 
-# try/except added for compatibility with python < 3.8
-try:
-    from unittest import mock
-    from unittest.mock import AsyncMock  # pragma: NO COVER
-except ImportError:  # pragma: NO COVER
-    import mock
+import mock
 
 import grpc
 from grpc.experimental import aio
diff --git a/tests/unit/gapic/pubsub_v1/test_subscriber.py b/tests/unit/gapic/pubsub_v1/test_subscriber.py
index 816b04500..52fc8c133 100644
--- a/tests/unit/gapic/pubsub_v1/test_subscriber.py
+++ b/tests/unit/gapic/pubsub_v1/test_subscriber.py
@@ -16,12 +16,7 @@
 import os
 import warnings
 
-# try/except added for compatibility with python < 3.8
-try:
-    from unittest import mock
-    from unittest.mock import AsyncMock  # pragma: NO COVER
-except ImportError:  # pragma: NO COVER
-    import mock
+import mock
 
 import grpc
 from grpc.experimental import aio
diff --git a/tests/unit/pubsub_v1/publisher/batch/test_thread.py b/tests/unit/pubsub_v1/publisher/batch/test_thread.py
index ad8fa376b..dc6d25fad 100644
--- a/tests/unit/pubsub_v1/publisher/batch/test_thread.py
+++ b/tests/unit/pubsub_v1/publisher/batch/test_thread.py
@@ -17,11 +17,7 @@
 import threading
 import time
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 import pytest
 
diff --git a/tests/unit/pubsub_v1/publisher/sequencer/test_ordered_sequencer.py b/tests/unit/pubsub_v1/publisher/sequencer/test_ordered_sequencer.py
index 4377d1447..f7c166aab 100644
--- a/tests/unit/pubsub_v1/publisher/sequencer/test_ordered_sequencer.py
+++ b/tests/unit/pubsub_v1/publisher/sequencer/test_ordered_sequencer.py
@@ -13,14 +13,8 @@
 # limitations under the License.
 
 import concurrent.futures as futures
-import sys
-
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
 
+from unittest import mock
 import pytest
 
 from google.auth import credentials
diff --git a/tests/unit/pubsub_v1/publisher/sequencer/test_unordered_sequencer.py b/tests/unit/pubsub_v1/publisher/sequencer/test_unordered_sequencer.py
index 739bae3bd..054e66da0 100644
--- a/tests/unit/pubsub_v1/publisher/sequencer/test_unordered_sequencer.py
+++ b/tests/unit/pubsub_v1/publisher/sequencer/test_unordered_sequencer.py
@@ -11,14 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import sys
-
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
 
+from unittest import mock
 import pytest
 
 from google.auth import credentials
diff --git a/tests/unit/pubsub_v1/publisher/test_publisher_client.py b/tests/unit/pubsub_v1/publisher/test_publisher_client.py
index 651c040ba..cc417d492 100644
--- a/tests/unit/pubsub_v1/publisher/test_publisher_client.py
+++ b/tests/unit/pubsub_v1/publisher/test_publisher_client.py
@@ -21,11 +21,7 @@
 import grpc
 import math
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 import pytest
 import time
diff --git a/tests/unit/pubsub_v1/subscriber/test_dispatcher.py b/tests/unit/pubsub_v1/subscriber/test_dispatcher.py
index 5483c48c5..23e1a6c18 100644
--- a/tests/unit/pubsub_v1/subscriber/test_dispatcher.py
+++ b/tests/unit/pubsub_v1/subscriber/test_dispatcher.py
@@ -29,11 +29,7 @@
 )
 from google.pubsub_v1.types import PubsubMessage
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 import pytest
 from google.cloud.pubsub_v1.subscriber.exceptions import (
diff --git a/tests/unit/pubsub_v1/subscriber/test_futures_subscriber.py b/tests/unit/pubsub_v1/subscriber/test_futures_subscriber.py
index d10da6fb1..c4c539f96 100644
--- a/tests/unit/pubsub_v1/subscriber/test_futures_subscriber.py
+++ b/tests/unit/pubsub_v1/subscriber/test_futures_subscriber.py
@@ -13,14 +13,8 @@
 # limitations under the License.
 
 from __future__ import absolute_import
-import sys
-
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
 
+from unittest import mock
 import pytest
 
 from google.cloud.pubsub_v1.subscriber import futures
diff --git a/tests/unit/pubsub_v1/subscriber/test_heartbeater.py b/tests/unit/pubsub_v1/subscriber/test_heartbeater.py
index 857152ac3..cd9fd9762 100644
--- a/tests/unit/pubsub_v1/subscriber/test_heartbeater.py
+++ b/tests/unit/pubsub_v1/subscriber/test_heartbeater.py
@@ -13,17 +13,12 @@
 # limitations under the License.
 
 import logging
-import sys
 import threading
 
 from google.cloud.pubsub_v1.subscriber._protocol import heartbeater
 from google.cloud.pubsub_v1.subscriber._protocol import streaming_pull_manager
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 import pytest
 
diff --git a/tests/unit/pubsub_v1/subscriber/test_helper_threads.py b/tests/unit/pubsub_v1/subscriber/test_helper_threads.py
index bfbaf3e56..54659a5a3 100644
--- a/tests/unit/pubsub_v1/subscriber/test_helper_threads.py
+++ b/tests/unit/pubsub_v1/subscriber/test_helper_threads.py
@@ -12,13 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
-
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 import queue
 
diff --git a/tests/unit/pubsub_v1/subscriber/test_leaser.py b/tests/unit/pubsub_v1/subscriber/test_leaser.py
index 606dcc2c9..3d2a96151 100644
--- a/tests/unit/pubsub_v1/subscriber/test_leaser.py
+++ b/tests/unit/pubsub_v1/subscriber/test_leaser.py
@@ -13,7 +13,6 @@
 # limitations under the License.
 
 import logging
-import sys
 import threading
 
 from google.cloud.pubsub_v1 import types
@@ -27,11 +26,7 @@
 )
 from google.cloud.pubsub_v1.subscriber import message
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 import pytest
 
diff --git a/tests/unit/pubsub_v1/subscriber/test_message.py b/tests/unit/pubsub_v1/subscriber/test_message.py
index 03bdc1514..676536f01 100644
--- a/tests/unit/pubsub_v1/subscriber/test_message.py
+++ b/tests/unit/pubsub_v1/subscriber/test_message.py
@@ -14,14 +14,9 @@
 
 import datetime
 import queue
-import sys
 import time
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 from google.api_core import datetime_helpers
 from google.cloud.pubsub_v1.subscriber import message
diff --git a/tests/unit/pubsub_v1/subscriber/test_scheduler.py b/tests/unit/pubsub_v1/subscriber/test_scheduler.py
index 3ed1978c1..22bd53729 100644
--- a/tests/unit/pubsub_v1/subscriber/test_scheduler.py
+++ b/tests/unit/pubsub_v1/subscriber/test_scheduler.py
@@ -15,15 +15,10 @@
 import concurrent.futures
 import queue
 import pytest
-import sys
 import threading
 import time
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 from google.cloud.pubsub_v1.subscriber import scheduler
 
diff --git a/tests/unit/pubsub_v1/subscriber/test_streaming_pull_manager.py b/tests/unit/pubsub_v1/subscriber/test_streaming_pull_manager.py
index b9561d747..953b882f8 100644
--- a/tests/unit/pubsub_v1/subscriber/test_streaming_pull_manager.py
+++ b/tests/unit/pubsub_v1/subscriber/test_streaming_pull_manager.py
@@ -32,11 +32,7 @@
 from google.cloud.pubsub_v1.types import PubsubMessage
 
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 import pytest
 
 from google.api_core import bidi
diff --git a/tests/unit/pubsub_v1/subscriber/test_subscribe_opentelemetry.py b/tests/unit/pubsub_v1/subscriber/test_subscribe_opentelemetry.py
index 2fb89aa7c..efa3e4f71 100644
--- a/tests/unit/pubsub_v1/subscriber/test_subscribe_opentelemetry.py
+++ b/tests/unit/pubsub_v1/subscriber/test_subscribe_opentelemetry.py
@@ -14,7 +14,6 @@
 
 import datetime
 import time
-import sys
 import queue
 import pytest
 
@@ -32,11 +31,7 @@
 from google.cloud.pubsub_v1.subscriber.message import Message
 from google.cloud.pubsub_v1.types import PubsubMessage
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 RECEIVED = datetime.datetime(2012, 4, 21, 15, 0, tzinfo=datetime.timezone.utc)
 RECEIVED_SECONDS = datetime_helpers.to_milliseconds(RECEIVED) // 1000
diff --git a/tests/unit/pubsub_v1/subscriber/test_subscriber_client.py b/tests/unit/pubsub_v1/subscriber/test_subscriber_client.py
index 3d3ff0111..ecaf23cf9 100644
--- a/tests/unit/pubsub_v1/subscriber/test_subscriber_client.py
+++ b/tests/unit/pubsub_v1/subscriber/test_subscriber_client.py
@@ -16,11 +16,7 @@
 
 import grpc
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 import pytest
 
diff --git a/tests/unit/pubsub_v1/test_futures.py b/tests/unit/pubsub_v1/test_futures.py
index 5a4dad41a..d6af2f359 100644
--- a/tests/unit/pubsub_v1/test_futures.py
+++ b/tests/unit/pubsub_v1/test_futures.py
@@ -17,11 +17,7 @@
 import threading
 import time
 
-# special case python < 3.8
-if sys.version_info.major == 3 and sys.version_info.minor < 8:
-    import mock
-else:
-    from unittest import mock
+from unittest import mock
 
 import pytest