diff --git a/test/definitions-eu/apm/dotNet/linux/debian10-nginx-aspnetcore.json b/test/definitions-eu/apm/dotNet/linux/debian13-nginx-aspnetcore.json
similarity index 97%
rename from test/definitions-eu/apm/dotNet/linux/debian10-nginx-aspnetcore.json
rename to test/definitions-eu/apm/dotNet/linux/debian13-nginx-aspnetcore.json
index e41140fdb..224650644 100644
--- a/test/definitions-eu/apm/dotNet/linux/debian10-nginx-aspnetcore.json
+++ b/test/definitions-eu/apm/dotNet/linux/debian13-nginx-aspnetcore.json
@@ -12,7 +12,7 @@
         "type": "ec2",
         "size": "t3.small",
         "comment": "This AMI requires to accept terms and conditions https://aws.amazon.com/marketplace/server/procurement?productId=0f258a51-0979-4be2-a6a9-ec8fe108514a",
-        "ami_name": "debian-10-amd64-202?????-*",
+        "ami_name": "debian-13-amd64-202?????-*",
         "user_name": "admin"
     }],
 
@@ -20,7 +20,7 @@
         "id": "aspnetcore",
         "destinations": ["debiannginxnetcore1"],
         "source_repository": "https://github.com/newrelic/open-install-library.git",
-        "deploy_script_path": "test/deploy/linux/dotNet/install/ubuntu20/roles",
+        "deploy_script_path": "test/deploy/linux/dotNet/install/debian13/roles",
         "port": 9999
       },
       { 
diff --git a/test/definitions-eu/apm/dotNet/linux/ubuntu20-apache-aspnetcore.json b/test/definitions-eu/apm/dotNet/linux/ubuntu24-apache-aspnetcore.json
similarity index 95%
rename from test/definitions-eu/apm/dotNet/linux/ubuntu20-apache-aspnetcore.json
rename to test/definitions-eu/apm/dotNet/linux/ubuntu24-apache-aspnetcore.json
index ceae51809..c14602ee5 100644
--- a/test/definitions-eu/apm/dotNet/linux/ubuntu20-apache-aspnetcore.json
+++ b/test/definitions-eu/apm/dotNet/linux/ubuntu24-apache-aspnetcore.json
@@ -11,7 +11,7 @@
         "provider": "aws",
         "type": "ec2",
         "size": "t3.micro",
-        "ami_name": "ubuntu-pro-server/images/hvm-ssd/ubuntu-focal-20.04-amd64-pro-server-????????",
+        "ami_name": "ubuntu/images/hvm-ssd-gp3/ubuntu-noble-24.04-amd64-server-202?????",
         "user_name": "ubuntu"
     }],
 
@@ -19,7 +19,7 @@
         "id": "aspnetcore",
         "destinations": ["ubuntuapachenetcore1"],
         "source_repository": "https://github.com/newrelic/open-install-library.git",
-        "deploy_script_path": "test/deploy/linux/dotNet/install/ubuntu20/roles",
+        "deploy_script_path": "test/deploy/linux/dotNet/install/ubuntu24/roles",
         "port": 9999
       },
       { 
diff --git a/test/definitions-eu/apm/dotNet/windows/windows2019-core-only-iis.json b/test/definitions-eu/apm/dotNet/windows/windows2022-core-only-iis.json
similarity index 86%
rename from test/definitions-eu/apm/dotNet/windows/windows2019-core-only-iis.json
rename to test/definitions-eu/apm/dotNet/windows/windows2022-core-only-iis.json
index b18ecaab6..3e70cdcf0 100644
--- a/test/definitions-eu/apm/dotNet/windows/windows2019-core-only-iis.json
+++ b/test/definitions-eu/apm/dotNet/windows/windows2022-core-only-iis.json
@@ -7,25 +7,25 @@
     },
   
     "resources": [{
-        "id": "iiswindows2019",
+        "id": "iiswindows2022",
         "provider": "aws",
         "type": "ec2",
         "size": "t3.small",
         "is_windows": true,
-        "ami_name": "Windows_Server-2019-English-Full-HyperV-*",
+        "ami_name": "Windows_Server-2022-English-Full-Base-*",
         "user_name": "Administrator"
     }],
   
     "services": [{
       "id": "iis",
-      "destinations": ["iiswindows2019"],
+      "destinations": ["iiswindows2022"],
       "source_repository": "https://github.com/newrelic/open-install-library.git",
       "deploy_script_path": "test/deploy/windows/iis/install/roles",
       "port": 9999
     },
     {
       "id": "coreapp",
-      "destinations": ["iiswindows2019"],
+      "destinations": ["iiswindows2022"],
       "source_repository": "https://github.com/newrelic/open-install-library.git",
       "deploy_script_path": "test/deploy/windows/iis/deploy-webapplication/roles",
       "port": 8083,
@@ -38,7 +38,7 @@
     "resources": [
       {
         "id": "nr_infra",
-        "resource_ids": ["iiswindows2019"],
+        "resource_ids": ["iiswindows2022"],
         "provider": "newrelic",
         "source_repository": "https://github.com/newrelic/open-install-library.git",
         "deploy_script_path": "test/deploy/windows/newrelic-cli/install/roles",
diff --git a/test/definitions-eu/apm/dotNet/windows/windows2019-iis.json b/test/definitions-eu/apm/dotNet/windows/windows2025-iis.json
similarity index 86%
rename from test/definitions-eu/apm/dotNet/windows/windows2019-iis.json
rename to test/definitions-eu/apm/dotNet/windows/windows2025-iis.json
index b10bc2eeb..382495326 100644
--- a/test/definitions-eu/apm/dotNet/windows/windows2019-iis.json
+++ b/test/definitions-eu/apm/dotNet/windows/windows2025-iis.json
@@ -7,36 +7,36 @@
   },
 
   "resources": [{
-      "id": "iiswindows2019",
+      "id": "iiswindows2025",
       "provider": "aws",
       "type": "ec2",
       "size": "t3.small",
       "is_windows": true,
-      "ami_name": "Windows_Server-2019-English-Full-HyperV-*",
+      "ami_name": "Windows_Server-2025-English-Full-Base-*",
       "user_name": "Administrator"
   }],
 
   "services": [{
     "id": "iis",
-    "destinations": ["iiswindows2019"],
+    "destinations": ["iiswindows2025"],
     "source_repository": "https://github.com/newrelic/open-install-library.git",
     "deploy_script_path": "test/deploy/windows/iis/install/roles",
     "port": 9999
   },{
     "id": "webapp1",
-    "destinations": ["iiswindows2019"],
+    "destinations": ["iiswindows2025"],
     "source_repository": "https://github.com/newrelic/open-install-library.git",
     "deploy_script_path": "test/deploy/windows/iis/deploy-webapplication/roles",
     "port": 8081
   },{
     "id": "webapp2",
-    "destinations": ["iiswindows2019"],
+    "destinations": ["iiswindows2025"],
     "source_repository": "https://github.com/newrelic/open-install-library.git",
     "deploy_script_path": "test/deploy/windows/iis/deploy-webapplication/roles",
     "port": 8082
   },{
     "id": "webapp3",
-    "destinations": ["iiswindows2019"],
+    "destinations": ["iiswindows2025"],
     "source_repository": "https://github.com/newrelic/open-install-library.git",
     "deploy_script_path": "test/deploy/windows/iis/deploy-webapplication/roles",
     "port": 8083,
@@ -49,7 +49,7 @@
     "resources": [
       {
           "id": "nr_infra",
-          "resource_ids": ["iiswindows2019"],
+          "resource_ids": ["iiswindows2025"],
           "provider": "newrelic",
           "source_repository": "https://github.com/newrelic/open-install-library.git",
           "deploy_script_path": "test/deploy/windows/newrelic-cli/install-recipe/roles",
diff --git a/test/deploy/linux/dotNet/install/debian13/roles/prepare/tasks/main.yml b/test/deploy/linux/dotNet/install/debian13/roles/prepare/tasks/main.yml
new file mode 100644
index 000000000..ca6ebbdec
--- /dev/null
+++ b/test/deploy/linux/dotNet/install/debian13/roles/prepare/tasks/main.yml
@@ -0,0 +1,37 @@
+---
+- debug:
+    msg: Install ASP.NET Core 10 Runtime
+
+# - name: Get package name
+#   shell: cat /etc/os-release | grep "PRETTY_NAME=\"" | awk -F = '{print $2}' | awk -F " " '{print $1}' | sed 's/["]//g'
+#   register: package_name
+
+# - name: Get package version
+#   shell: cat /etc/os-release | grep "VERSION_ID=\"" | awk -F = '{print $2}' | awk -F " " '{print $1}' | sed 's/["]//g'
+#   register: package_version
+
+# - name:
+#   set_fact:
+#     package_url: "https://packages.microsoft.com/config/{{package_name.stdout | lower }}/{{package_version.stdout | lower }}/packages-microsoft-prod.deb"
+
+# - debug:
+#     msg: "Using download URL of {{package_url}}"
+
+# - name: Download Microsoft package signing key and add Microsoft package repository
+#   shell: |
+#     wget "{{package_url}}" -O packages-microsoft-prod.deb
+#     dpkg -i packages-microsoft-prod.deb
+#   become: true
+
+- name: Install dependencies
+  shell: |
+    apt update
+    apt install -y wget libicu76
+  become: true
+
+- name: Install ASP.NET Core 10 Runtime
+  shell: |
+    wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh
+    chmod +x dotnet-install.sh
+    ./dotnet-install.sh --runtime aspnetcore --version 10.0.0
+  become: true
diff --git a/test/deploy/linux/dotNet/install/rhel/roles/prepare/tasks/main.yml b/test/deploy/linux/dotNet/install/rhel/roles/prepare/tasks/main.yml
index 9e618cfc6..f887f5b15 100644
--- a/test/deploy/linux/dotNet/install/rhel/roles/prepare/tasks/main.yml
+++ b/test/deploy/linux/dotNet/install/rhel/roles/prepare/tasks/main.yml
@@ -2,20 +2,21 @@
 - debug:
     msg: Install .NET
 
-# https://learn.microsoft.com/en-us/dotnet/core/install/linux-centos#centos-linux-7
+# https://learn.microsoft.com/en-us/dotnet/core/install/linux-rhel#centos-stream-10
+# Per the article above, ".NET is included in the AppStream repositories for CentOS Stream 10."
 
-- name: Install Centos 7 RPM
-  ansible.builtin.yum:
-    name: https://packages.microsoft.com/config/centos/7/packages-microsoft-prod.rpm
-    state: present
-    lock_timeout: 180
-  become: true
+# - name: Install Centos Stream 10 RPM
+#   ansible.builtin.yum:
+#     name: https://packages.microsoft.com/config/centos/7/packages-microsoft-prod.rpm
+#     state: present
+#     lock_timeout: 180
+#   become: true
 
-- name: Install .NET SDK 7.0 and ASP.NET Core 7.0 runtime
+- name: Install .NET 10 SDK and ASP.NET Core Runtime
   ansible.builtin.yum:
     name: 
-      - dotnet-sdk-7.0
-      - aspnetcore-runtime-7.0
+      - dotnet-sdk-10.0
+      - aspnetcore-runtime-10.0 #I think this is redundant since sdk includes runtime
     state: latest
     lock_timeout: 180
   become: true
diff --git a/test/deploy/linux/dotNet/install/ubuntu20/roles/prepare/tasks/main.yml b/test/deploy/linux/dotNet/install/ubuntu24/roles/prepare/tasks/main.yml
similarity index 88%
rename from test/deploy/linux/dotNet/install/ubuntu20/roles/prepare/tasks/main.yml
rename to test/deploy/linux/dotNet/install/ubuntu24/roles/prepare/tasks/main.yml
index ebcd60dff..6daf0dcf7 100644
--- a/test/deploy/linux/dotNet/install/ubuntu20/roles/prepare/tasks/main.yml
+++ b/test/deploy/linux/dotNet/install/ubuntu24/roles/prepare/tasks/main.yml
@@ -1,6 +1,6 @@
 ---
 - debug:
-    msg: Install ASP.NET Core 5.0 Runtime
+    msg: Install ASP.NET Core 10 Runtime
 
 - name: Get package name
   shell: cat /etc/os-release | grep "PRETTY_NAME=\"" | awk -F = '{print $2}' | awk -F " " '{print $1}' | sed 's/["]//g'
@@ -27,9 +27,9 @@
   shell: apt update
   become: true
 
-- name: Install ASP.NET Core 5.0 Runtime
+- name: Install ASP.NET Core 10 Runtime
   shell: |
     apt install apt-transport-https -y
     apt update
-    apt install aspnetcore-runtime-5.0 -y
+    apt install aspnetcore-runtime-10.0 -y
   become: true