diff --git a/bindgen/visitor/TreeVisitor.cpp b/bindgen/visitor/TreeVisitor.cpp
index 9d4420b..6c6277d 100644
--- a/bindgen/visitor/TreeVisitor.cpp
+++ b/bindgen/visitor/TreeVisitor.cpp
@@ -18,7 +18,7 @@ bool TreeVisitor::VisitFunctionDecl(clang::FunctionDecl *func) {
         std::string pname = parm->getNameAsString();
 
         if (pname.empty()) {
-            pname = "anonymous" + std::to_string(anonCounter++);
+            pname = "p" + std::to_string(anonCounter++);
         }
 
         std::shared_ptr<Type> ptype = typeTranslator.translate(parm->getType());
diff --git a/tests/samples/Function.scala b/tests/samples/Function.scala
index 3f5f63c..1975567 100644
--- a/tests/samples/Function.scala
+++ b/tests/samples/Function.scala
@@ -13,9 +13,9 @@ object Function {
   def void_arg(): native.CFloat = native.extern
   def one_arg(a: native.CInt): native.CChar = native.extern
   def two_args(a: native.CFloat, b: native.CInt): native.Ptr[Byte] = native.extern
-  def anonymous_args(anonymous0: native.CFloat, anonymous1: native.CInt): native.CDouble = native.extern
+  def anonymous_args(p0: native.CFloat, p1: native.CInt): native.CDouble = native.extern
   def variadic_args(a: native.CDouble, varArgs: native.CString, varArgs0: native.CVararg*): native.CDouble = native.extern
-  def acceptsArray(anonymous0: native.Ptr[native.CInt]): Unit = native.extern
+  def acceptsArray(p0: native.Ptr[native.CInt]): Unit = native.extern
 }
 
 import Function._
@@ -34,4 +34,3 @@ object FunctionHelpers {
     def a_=(value: native.CInt): Unit = !p.cast[native.Ptr[native.CInt]] = value
   }
 }
-
diff --git a/tests/samples/OpaqueTypes.scala b/tests/samples/OpaqueTypes.scala
index 5c181a8..03607e9 100644
--- a/tests/samples/OpaqueTypes.scala
+++ b/tests/samples/OpaqueTypes.scala
@@ -23,10 +23,10 @@ object OpaqueTypes {
   type functionPointerWithPointerToOpaqueType = native.CFunctionPtr1[native.Ptr[native.Ptr[struct_undefinedStruct]], native.Ptr[undefinedUnion]]
   def move(point: native.Ptr[struct_point], x: native.CInt, y: native.CInt): native.Ptr[struct_point] = native.extern
   def processPoints(p: native.Ptr[points]): native.Ptr[union_u] = native.extern
-  def usePointerToUndefinedStruct(anonymous0: native.Ptr[struct_undefinedStruct]): Unit = native.extern
+  def usePointerToUndefinedStruct(p0: native.Ptr[struct_undefinedStruct]): Unit = native.extern
   def fun(): native.Ptr[native.Ptr[undefinedUnion]] = native.extern
   def returnPointerToAliasOfUndefinedStruct(): native.Ptr[aliasForUndefinedStruct] = native.extern
-  def usePointerToUndefinedIncludedStruct(anonymous0: native.Ptr[undefinedIncludedStruct]): Unit = native.extern
+  def usePointerToUndefinedIncludedStruct(p0: native.Ptr[undefinedIncludedStruct]): Unit = native.extern
 }
 
 import OpaqueTypes._
diff --git a/tests/samples/PrivateMembers.scala b/tests/samples/PrivateMembers.scala
index 1d488ac..3610061 100644
--- a/tests/samples/PrivateMembers.scala
+++ b/tests/samples/PrivateMembers.scala
@@ -19,9 +19,9 @@ object PrivateMembers {
   type privateStructWithTypedefPtr = native.Ptr[struct_privateStructWithTypedef]
   def getTypeThatUsesPrivateTypes(): pid_t = native.extern
   def getPrivateType(): native.Ptr[__private_type] = native.extern
-  def usesPrivateUnion(anonymous0: native.Ptr[union___unionWithPrivateName]): Unit = native.extern
-  def usesPrivateStruct(anonymous0: native.Ptr[struct_structWithPrivateType], anonymous1: native.Ptr[struct_normalStruct]): Unit = native.extern
-  def usesPrivateEnum(anonymous0: native.Ptr[enum___privateEnum]): Unit = native.extern
+  def usesPrivateUnion(p0: native.Ptr[union___unionWithPrivateName]): Unit = native.extern
+  def usesPrivateStruct(p0: native.Ptr[struct_structWithPrivateType], p1: native.Ptr[struct_normalStruct]): Unit = native.extern
+  def usesPrivateEnum(p0: native.Ptr[enum___privateEnum]): Unit = native.extern
 }
 
 import PrivateMembers._
diff --git a/tests/samples/ReuseBindings.scala b/tests/samples/ReuseBindings.scala
index ceee2c4..e1f03e7 100644
--- a/tests/samples/ReuseBindings.scala
+++ b/tests/samples/ReuseBindings.scala
@@ -8,7 +8,7 @@ import scala.scalanative.native._
 object ReuseBindings {
   type aliasForBigStruct = org.scalanative.bindgen.samples.Struct.struct_bigStruct
   type struct_usesImportedEnum = native.CStruct1[org.scalanative.bindgen.samples.Struct.enum_pointIndex]
-  def useStruct(anonymous0: native.Ptr[org.scalanative.bindgen.samples.Struct.struct_point]): Unit = native.extern
+  def useStruct(p0: native.Ptr[org.scalanative.bindgen.samples.Struct.struct_point]): Unit = native.extern
   def returnTypedef_point_s(): native.Ptr[org.scalanative.bindgen.samples.Struct.struct_point] = native.extern
   def returnTypedef_point(): native.Ptr[org.scalanative.bindgen.samples.Struct.point] = native.extern
   def readBook(book: native.Ptr[org.scalanative.bindgen.samples.CustomNames.book]): Unit = native.extern
diff --git a/tests/samples/native.scala b/tests/samples/native.scala
index 538bfdb..cc3cfe8 100644
--- a/tests/samples/native.scala
+++ b/tests/samples/native.scala
@@ -8,6 +8,6 @@ import scala.scalanative.native._
 object nativeLib {
   type nativeFunc0 = native.CInt
   @native.link("native")
-  def nativeFunc0(anonymous0: native.CInt): Unit = native.extern
-  def nativeFunc(anonymous0: native.CFloat): Unit = native.extern
+  def nativeFunc0(p0: native.CInt): Unit = native.extern
+  def nativeFunc(p0: native.CFloat): Unit = native.extern
 }