diff --git a/go/testplans/common.pb.go b/go/testplans/common.pb.go
index 315f31b..dcf6e78 100644
--- a/go/testplans/common.pb.go
+++ b/go/testplans/common.pb.go
@@ -69,7 +69,16 @@
 	// **/OWNERS to match any OWNERS file
 	// **/*.md to match any .md file
 	// src/somefile.java to match a specific file
-	Pattern              string   `protobuf:"bytes,1,opt,name=pattern,proto3" json:"pattern,omitempty"`
+	Pattern string `protobuf:"bytes,1,opt,name=pattern,proto3" json:"pattern,omitempty"`
+	// Bash patterns that exclude files in the chromiumos checkout from a match.
+	//
+	// A file in the chromiumos checkout is considered a match iff:
+	// 1. It matches pattern.
+	// 2. It doesn't match any of exclude_patterns.
+	//
+	// The matching rules of exclude_patterns are the same as patterns, e.g.
+	// globstar is allowed.
+	ExcludePatterns      []string `protobuf:"bytes,2,rep,name=exclude_patterns,json=excludePatterns,proto3" json:"exclude_patterns,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`
 	XXX_unrecognized     []byte   `json:"-"`
 	XXX_sizecache        int32    `json:"-"`
@@ -107,6 +116,13 @@
 	return ""
 }
 
+func (m *FilePattern) GetExcludePatterns() []string {
+	if m != nil {
+		return m.ExcludePatterns
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterType((*ProtoBytes)(nil), "testplans.ProtoBytes")
 	proto.RegisterType((*FilePattern)(nil), "testplans.FilePattern")
@@ -115,16 +131,17 @@
 func init() { proto.RegisterFile("testplans/common.proto", fileDescriptor_a516c54fffa1af30) }
 
 var fileDescriptor_a516c54fffa1af30 = []byte{
-	// 164 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0x2b, 0x49, 0x2d, 0x2e,
-	0x29, 0xc8, 0x49, 0xcc, 0x2b, 0xd6, 0x4f, 0xce, 0xcf, 0xcd, 0xcd, 0xcf, 0xd3, 0x2b, 0x28, 0xca,
-	0x2f, 0xc9, 0x17, 0xe2, 0x84, 0x8b, 0x2b, 0x99, 0x73, 0x71, 0x05, 0x80, 0xc4, 0x9c, 0x2a, 0x4b,
-	0x52, 0x8b, 0x85, 0x34, 0xb9, 0x04, 0x8a, 0x53, 0x8b, 0x32, 0x13, 0x73, 0x32, 0xab, 0x52, 0x53,
-	0xe2, 0xc1, 0x8a, 0x25, 0x18, 0x15, 0x18, 0x35, 0x78, 0x82, 0xf8, 0x11, 0xe2, 0x60, 0xf5, 0x4a,
-	0xea, 0x5c, 0xdc, 0x6e, 0x99, 0x39, 0xa9, 0x01, 0x89, 0x25, 0x25, 0xa9, 0x45, 0x79, 0x42, 0x12,
-	0x5c, 0xec, 0x05, 0x10, 0x26, 0x58, 0x03, 0x67, 0x10, 0x8c, 0xeb, 0x64, 0x1a, 0x65, 0x9c, 0x9e,
-	0xaf, 0x97, 0x9c, 0x51, 0x94, 0x9f, 0x9b, 0x59, 0x9a, 0xab, 0x97, 0x5f, 0x94, 0xae, 0x0f, 0xe3,
-	0xe4, 0x17, 0xeb, 0x67, 0xe6, 0xa5, 0x15, 0x25, 0xea, 0x83, 0x6d, 0xd2, 0x4f, 0xcf, 0xd7, 0x87,
-	0x3b, 0x2c, 0x89, 0x0d, 0x2c, 0x66, 0x0c, 0x08, 0x00, 0x00, 0xff, 0xff, 0x7b, 0xac, 0x82, 0xc9,
-	0xc4, 0x00, 0x00, 0x00,
+	// 190 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x44, 0xcf, 0xb1, 0x8b, 0x83, 0x30,
+	0x18, 0x05, 0x70, 0xbc, 0x83, 0x3b, 0x4c, 0x0b, 0x16, 0x87, 0xe2, 0x28, 0x4e, 0x76, 0x31, 0x83,
+	0x94, 0xee, 0x0e, 0x9d, 0x25, 0x63, 0x17, 0x49, 0xf5, 0xab, 0x0d, 0x24, 0xf9, 0x24, 0x89, 0xd0,
+	0xf6, 0xaf, 0x2f, 0xa6, 0x6a, 0xb7, 0xbc, 0x1f, 0x2f, 0x8f, 0x84, 0xec, 0x1d, 0x58, 0x37, 0x48,
+	0xae, 0x2d, 0x6d, 0x51, 0x29, 0xd4, 0xc5, 0x60, 0xd0, 0x61, 0x1c, 0xae, 0x9e, 0x9d, 0x08, 0xa9,
+	0x27, 0xab, 0x9e, 0x0e, 0x6c, 0x7c, 0x20, 0x3b, 0x0b, 0x46, 0x70, 0x29, 0x5e, 0xd0, 0x35, 0xbe,
+	0x9c, 0x04, 0x69, 0x90, 0x6f, 0x59, 0xf4, 0x75, 0xdf, 0xcf, 0x18, 0xd9, 0x9c, 0x85, 0x84, 0x9a,
+	0x3b, 0x07, 0x46, 0xc7, 0x09, 0xf9, 0x1f, 0x3e, 0x47, 0x7f, 0x21, 0x64, 0x4b, 0x9c, 0x36, 0xe1,
+	0xd1, 0xca, 0xb1, 0x83, 0x66, 0x26, 0x9b, 0xfc, 0xa4, 0xbf, 0x79, 0xc8, 0xa2, 0xd9, 0xe7, 0x0d,
+	0x5b, 0x1d, 0x2f, 0x65, 0x8f, 0x45, 0x7b, 0x37, 0xa8, 0xc4, 0xa8, 0x0a, 0x34, 0x3d, 0x5d, 0x02,
+	0x5a, 0x2a, 0xf4, 0xcd, 0x70, 0xea, 0x1f, 0x45, 0x7b, 0xa4, 0xeb, 0x1f, 0xae, 0x7f, 0xde, 0xca,
+	0x77, 0x00, 0x00, 0x00, 0xff, 0xff, 0x13, 0x10, 0x4d, 0x16, 0xef, 0x00, 0x00, 0x00,
 }
diff --git a/src/testplans/common.proto b/src/testplans/common.proto
index e4bc221..0f97e87 100644
--- a/src/testplans/common.proto
+++ b/src/testplans/common.proto
@@ -23,4 +23,14 @@
   // **/*.md to match any .md file
   // src/somefile.java to match a specific file
   string pattern = 1;
+
+  // Bash patterns that exclude files in the chromiumos checkout from a match.
+  //
+  // A file in the chromiumos checkout is considered a match iff:
+  // 1. It matches pattern.
+  // 2. It doesn't match any of exclude_patterns.
+  //
+  // The matching rules of exclude_patterns are the same as patterns, e.g.
+  // globstar is allowed.
+  repeated string exclude_patterns = 2;
 }