diff --git a/samples/pyarrow/requirements-test.txt b/samples/pyarrow/requirements-test.txt
index 0404a8ad..7561ed55 100644
--- a/samples/pyarrow/requirements-test.txt
+++ b/samples/pyarrow/requirements-test.txt
@@ -1,2 +1,3 @@
 pytest===7.4.3; python_version == '3.7'
-pytest==8.3.5; python_version >= '3.8'
+pytest===8.3.5; python_version == '3.8'
+pytest==8.4.1; python_version >= '3.9'
diff --git a/samples/quickstart/requirements-test.txt b/samples/quickstart/requirements-test.txt
index 0404a8ad..7561ed55 100644
--- a/samples/quickstart/requirements-test.txt
+++ b/samples/quickstart/requirements-test.txt
@@ -1,2 +1,3 @@
 pytest===7.4.3; python_version == '3.7'
-pytest==8.3.5; python_version >= '3.8'
+pytest===8.3.5; python_version == '3.8'
+pytest==8.4.1; python_version >= '3.9'
diff --git a/samples/snippets/requirements-test.txt b/samples/snippets/requirements-test.txt
index a6c65ca6..230ca56d 100644
--- a/samples/snippets/requirements-test.txt
+++ b/samples/snippets/requirements-test.txt
@@ -1,3 +1,4 @@
 google-cloud-testutils==1.6.4
 pytest===7.4.3; python_version == '3.7'
-pytest==8.3.5; python_version >= '3.8'
+pytest===8.3.5; python_version == '3.8'
+pytest==8.4.1; python_version >= '3.9'
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index c34026ed..0ae6c4df 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,3 +1,6 @@
 google-cloud-bigquery-storage==2.32.0
 google-cloud-bigquery===3.30.0; python_version <= '3.8'
 google-cloud-bigquery==3.34.0; python_version >= '3.9'
+pytest===7.4.3; python_version == '3.7'
+pytest===8.3.5; python_version == '3.8'
+pytest==8.4.1; python_version >= '3.9'
diff --git a/samples/to_dataframe/requirements-test.txt b/samples/to_dataframe/requirements-test.txt
index 0404a8ad..7561ed55 100644
--- a/samples/to_dataframe/requirements-test.txt
+++ b/samples/to_dataframe/requirements-test.txt
@@ -1,2 +1,3 @@
 pytest===7.4.3; python_version == '3.7'
-pytest==8.3.5; python_version >= '3.8'
+pytest===8.3.5; python_version == '3.8'
+pytest==8.4.1; python_version >= '3.9'
diff --git a/samples/to_dataframe/requirements.txt b/samples/to_dataframe/requirements.txt
index d12e3e9c..e3b75fda 100644
--- a/samples/to_dataframe/requirements.txt
+++ b/samples/to_dataframe/requirements.txt
@@ -1,19 +1,19 @@
-google-auth==2.40.2
+google-auth==2.40.3
 google-cloud-bigquery-storage==2.32.0
 google-cloud-bigquery===3.30.0; python_version <= '3.8'
-google-cloud-bigquery==3.34.0; python_version >= '3.9'
+google-cloud-bigquery==3.35.1; python_version >= '3.9'
 pyarrow===12.0.1; python_version == '3.7'
 pyarrow===17.0.0; python_version == '3.8'
-pyarrow==20.0.0; python_version >= '3.9'
+pyarrow==21.0.0; python_version >= '3.9'
 ipython===7.31.1; python_version == '3.7'
 ipython===8.10.0; python_version == '3.8'
 ipython===8.18.1; python_version == '3.9'
 ipython===8.33.0; python_version == '3.10'
-ipython==9.2.0; python_version >= '3.11'
+ipython==9.4.0; python_version >= '3.11'
 ipywidgets==8.1.7
 pandas===1.3.5; python_version == '3.7'
 pandas===2.0.3; python_version == '3.8'
-pandas==2.2.3; python_version >= '3.9'
+pandas==2.3.1; python_version >= '3.9'
 tqdm==4.67.1
 db-dtypes===1.4.2; python_version <= '3.8'
 db-dtypes==1.4.3; python_version >= '3.9'