diff --git a/.github/workflows/c.yaml b/.github/workflows/c.yaml
index 6f920d6..fbb3a88 100644
--- a/.github/workflows/c.yaml
+++ b/.github/workflows/c.yaml
@@ -1,7 +1,7 @@
 name: C
 
 on:
-  push:
+  pull_request:
 jobs:
   runtests:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/i386-linux-handwritten.yml b/.github/workflows/i386-linux-handwritten.yml
index 337eb3a..89956c4 100644
--- a/.github/workflows/i386-linux-handwritten.yml
+++ b/.github/workflows/i386-linux-handwritten.yml
@@ -1,7 +1,7 @@
 name: i386-linux-handwritten
 
 on:
-  push:
+  pull_request:
 jobs:
   runtests:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/python.yaml b/.github/workflows/python.yaml
index a193e29..d28ece8 100644
--- a/.github/workflows/python.yaml
+++ b/.github/workflows/python.yaml
@@ -1,7 +1,7 @@
 name: python
 
 on:
-  push:
+  pull_request:
 jobs:
   runtests:
     runs-on: ubuntu-latest