diff --git a/.github/workflows/32-bit-linux.yml b/.github/workflows/32-bit-linux.yml
index e14be521ff523..03925991ec632 100644
--- a/.github/workflows/32-bit-linux.yml
+++ b/.github/workflows/32-bit-linux.yml
@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
   pull_request:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
     paths-ignore:
       - "doc/**"
 
diff --git a/.github/workflows/code-checks.yml b/.github/workflows/code-checks.yml
index 8555ac558c63c..9756843350036 100644
--- a/.github/workflows/code-checks.yml
+++ b/.github/workflows/code-checks.yml
@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
   pull_request:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
 
 env:
   ENV_FILE: environment.yml
diff --git a/.github/workflows/docbuild-and-upload.yml b/.github/workflows/docbuild-and-upload.yml
index d2df75777e049..9840596357d26 100644
--- a/.github/workflows/docbuild-and-upload.yml
+++ b/.github/workflows/docbuild-and-upload.yml
@@ -5,14 +5,12 @@ on:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
     tags:
       - '*'
   pull_request:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
 
 env:
   ENV_FILE: environment.yml
diff --git a/.github/workflows/macos-windows.yml b/.github/workflows/macos-windows.yml
index 647dcf715c956..15308d0c086f6 100644
--- a/.github/workflows/macos-windows.yml
+++ b/.github/workflows/macos-windows.yml
@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
   pull_request:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
     paths-ignore:
       - "doc/**"
       - "web/**"
diff --git a/.github/workflows/package-checks.yml b/.github/workflows/package-checks.yml
index d5854b3fcad18..a1402603e2140 100644
--- a/.github/workflows/package-checks.yml
+++ b/.github/workflows/package-checks.yml
@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
   pull_request:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
     types: [ labeled, opened, synchronize, reopened ]
 
 permissions:
diff --git a/.github/workflows/python-dev.yml b/.github/workflows/python-dev.yml
index 5730e2b75f48f..d498c1c3a22a3 100644
--- a/.github/workflows/python-dev.yml
+++ b/.github/workflows/python-dev.yml
@@ -23,13 +23,13 @@ name: Python Dev
 on:
   push:
     branches:
-#      - main
-#      - 1.5.x
+      - main
+      - 2.0.x
       - None
   pull_request:
     branches:
-#      - main
-#      - 1.5.x
+      - main
+      - 2.0.x
       - None
     paths-ignore:
       - "doc/**"
@@ -47,7 +47,7 @@ permissions:
 
 jobs:
   build:
-    # if: false # Uncomment this to freeze the workflow, comment it to unfreeze
+    if: false # Uncomment this to freeze the workflow, comment it to unfreeze
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
diff --git a/.github/workflows/sdist.yml b/.github/workflows/sdist.yml
index d2346758f31c2..cd99a1e3e805c 100644
--- a/.github/workflows/sdist.yml
+++ b/.github/workflows/sdist.yml
@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
   pull_request:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
     types: [labeled, opened, synchronize, reopened]
     paths-ignore:
       - "doc/**"
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 1b82816796e10..fe318ce80c98d 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -5,12 +5,10 @@ on:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
   pull_request:
     branches:
       - main
       - 2.0.x
-      - 1.5.x
     paths-ignore:
       - "doc/**"
       - "web/**"