diff --git a/packages/essdiffraction/pyproject.toml b/packages/essdiffraction/pyproject.toml
index 706278ab2..416a991b5 100644
--- a/packages/essdiffraction/pyproject.toml
+++ b/packages/essdiffraction/pyproject.toml
@@ -45,7 +45,7 @@ dynamic = ["version"]
 test = [
     "pandas>=2.1.2",
     "pooch>=1.5",
-    "pytest>=7.0",
+    "pytest>=9.0",
     "ipywidgets>=8.1.7",
     "anywidget>=0.8.0",
     "pythreejs>=2.4.1",
diff --git a/packages/essimaging/pyproject.toml b/packages/essimaging/pyproject.toml
index 0635b5899..6c90375f7 100644
--- a/packages/essimaging/pyproject.toml
+++ b/packages/essimaging/pyproject.toml
@@ -40,7 +40,7 @@ dependencies = [
 
 [project.optional-dependencies]
 test = [
-    "pytest>=8.0",
+    "pytest>=9.0",
     "pooch>=1.5",
     "tof>=26.3.0",
     "scitiff>=24.6.0",
diff --git a/packages/essnmx/pyproject.toml b/packages/essnmx/pyproject.toml
index f3067840e..4cff36c77 100644
--- a/packages/essnmx/pyproject.toml
+++ b/packages/essnmx/pyproject.toml
@@ -52,7 +52,7 @@ essnmx-reduce = "ess.nmx.executables:main"
 
 [project.optional-dependencies]
 test = [
-    "pytest>=8.0",
+    "pytest>=9.0",
     "bitshuffle>=0.5.2;os_name == 'posix'",
 ]
 docs = [
diff --git a/packages/essreduce/pyproject.toml b/packages/essreduce/pyproject.toml
index 08a87972c..b0418a347 100644
--- a/packages/essreduce/pyproject.toml
+++ b/packages/essreduce/pyproject.toml
@@ -45,7 +45,7 @@ test = [
     "matplotlib>=3.10.7",
     "numba>=0.63",
     "pooch>=1.9.0",
-    "pytest>=7.0",
+    "pytest>=9.0",
     "tof>=25.12.0",
     "pandas>=2.1.2",
 ]
diff --git a/packages/essreflectometry/pyproject.toml b/packages/essreflectometry/pyproject.toml
index 9323e6070..d685ec780 100644
--- a/packages/essreflectometry/pyproject.toml
+++ b/packages/essreflectometry/pyproject.toml
@@ -43,7 +43,7 @@ dynamic = ["version"]
 
 [project.optional-dependencies]
 test = [
-    "pytest>=7.0",
+    "pytest>=9.0",
     "pooch>=1.5",
 ]
 gui = [
diff --git a/packages/esssans/pyproject.toml b/packages/esssans/pyproject.toml
index b17584cf4..8a5cd1048 100644
--- a/packages/esssans/pyproject.toml
+++ b/packages/esssans/pyproject.toml
@@ -41,7 +41,7 @@ dependencies = [
 [project.optional-dependencies]
 test = [
     "ipympl>=0.9.4",
-    "pytest>=7.0",
+    "pytest>=9.0",
     "pooch>=1.5",
     "scipy>=1.15.0",
     "anywidget>=0.8.0",
diff --git a/packages/essspectroscopy/pyproject.toml b/packages/essspectroscopy/pyproject.toml
index 5d0d4bd3c..5ac9a9b21 100644
--- a/packages/essspectroscopy/pyproject.toml
+++ b/packages/essspectroscopy/pyproject.toml
@@ -42,7 +42,7 @@ dynamic = ["version"]
 [project.optional-dependencies]
 test = [
     "pooch>=1.5",
-    "pytest>=7.0",
+    "pytest>=9.0",
 ]
 docs = [
     "autodoc-pydantic>=2.0.0",