diff --git a/fpdfsdk/cpdfsdk_formfillenvironment.cpp b/fpdfsdk/cpdfsdk_formfillenvironment.cpp
index 84df6e1..9aade3a 100644
--- a/fpdfsdk/cpdfsdk_formfillenvironment.cpp
+++ b/fpdfsdk/cpdfsdk_formfillenvironment.cpp
@@ -1040,7 +1040,6 @@
       break;
     case CPDF_Action::Type::kJavaScript:
       NOTREACHED_NORETURN();
-      break;
     case CPDF_Action::Type::kSetOCGState:
     case CPDF_Action::Type::kThread:
     case CPDF_Action::Type::kSound:
@@ -1123,7 +1122,6 @@
         break;
       default:
         NOTREACHED_NORETURN();
-        break;
     }
   });
 }
@@ -1170,7 +1168,6 @@
         break;
       default:
         NOTREACHED_NORETURN();
-        break;
     }
   });
 }
diff --git a/fpdfsdk/cpdfsdk_widget.cpp b/fpdfsdk/cpdfsdk_widget.cpp
index c336f5e..0b8083e 100644
--- a/fpdfsdk/cpdfsdk_widget.cpp
+++ b/fpdfsdk/cpdfsdk_widget.cpp
@@ -177,7 +177,6 @@
     case CPDF_AAction::kDocumentOpen:
     case CPDF_AAction::kNumberOfActions:
       NOTREACHED_NORETURN();
-      break;
   }
 
   return eEventType;
diff --git a/fpdfsdk/pwl/cpwl_cblistbox.cpp b/fpdfsdk/pwl/cpwl_cblistbox.cpp
index 492b6ae..0771b26 100644
--- a/fpdfsdk/pwl/cpwl_cblistbox.cpp
+++ b/fpdfsdk/pwl/cpwl_cblistbox.cpp
@@ -75,7 +75,6 @@
       break;
     default:
       NOTREACHED_NORETURN();
-      break;
   }
   return OnNotifySelectionChanged(true, nFlag);
 }
diff --git a/testing/embedder_test.cpp b/testing/embedder_test.cpp
index 04b805d..4d31c91 100644
--- a/testing/embedder_test.cpp
+++ b/testing/embedder_test.cpp
@@ -678,7 +678,6 @@
       return 4;
     default:
       NOTREACHED_NORETURN();
-      return 0;
   }
 }
 
diff --git a/testing/image_diff/image_diff_png.cpp b/testing/image_diff/image_diff_png.cpp
index e3ceb91..5a89e35 100644
--- a/testing/image_diff/image_diff_png.cpp
+++ b/testing/image_diff/image_diff_png.cpp
@@ -255,7 +255,6 @@
         break;
       default:
         NOTREACHED_NORETURN();
-        break;
     }
   } else if (channels == 4) {
     switch (state->output_format) {
@@ -273,7 +272,6 @@
         break;
       default:
         NOTREACHED_NORETURN();
-        break;
     }
   } else {
     NOTREACHED_NORETURN();