diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 46814fb1..4641c757 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,6 +10,15 @@ on:
       - '*.mk'
       - '.github/workflows/build.yml'
 
+  pull_request:
+    paths:
+      - 'src/**'
+      - 'include/**'
+      - 'tools/src/**'
+      - 'Makefile'
+      - '*.mk'
+      - '.github/workflows/build.yml'
+
 jobs:
 
   build:
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 4aa132c4..03c87df5 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -8,6 +8,14 @@ on:
       - 'Makefile'
       - '*.mk'
       - '.github/workflows/check.yml'
+      
+  pull_request:
+    paths:
+      - 'src/**'
+      - 'include/**'
+      - 'Makefile'
+      - '*.mk'
+      - '.github/workflows/check.yml'
 
 jobs:
 
diff --git a/.github/workflows/dox.yml b/.github/workflows/dox.yml
index 2156d1fc..8885c568 100644
--- a/.github/workflows/dox.yml
+++ b/.github/workflows/dox.yml
@@ -13,7 +13,16 @@ on:
       - 'Doxyfile'
       - '*.md'
       - '.github/workflows/dox.yml'
-      
+
+  pull_request:
+    paths:
+      - 'src/**'
+      - 'include/**'
+      - 'css/**'
+      - 'resources/**'
+      - 'Doxyfile'
+      - '*.md'
+      - '.github/workflows/dox.yml'
 jobs:   
 
   apidocs:
diff --git a/.github/workflows/example.yml b/.github/workflows/example.yml
index 818e70e3..abfae741 100644
--- a/.github/workflows/example.yml
+++ b/.github/workflows/example.yml
@@ -6,6 +6,11 @@ on:
       - 'examples/**'
       - '.github/workflows/example.yml'
 
+  pull_request:
+    paths:
+      - 'examples/**'
+      - '.github/workflows/example.yml'
+
 jobs:
 
   build:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 832d8833..f6e85a43 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,6 +12,17 @@ on:
       - 'test/Makefile'
       - '.github/workflows/test.yml'
 
+  pull_request:
+    paths:
+      - 'src/**'
+      - 'include/**'
+      - 'test/src/**'
+      - 'test/reference/**'
+      - 'Makefile'
+      - '*.mk'
+      - 'test/Makefile'
+      - '.github/workflows/test.yml'
+
 jobs:
 
   test: