diff --git a/test/dtrace/test_array_create.rb b/test/dtrace/test_array_create.rb
index a7c4687f6f..1bf20085ba 100644
--- a/test/dtrace/test_array_create.rb
+++ b/test/dtrace/test_array_create.rb
@@ -14,11 +14,11 @@ module DTrace
     end
 
     def test_many_lit
-      trap_probe(probe, '[1,2,3,4]') { |_,rbfile,saw|
-        saw = saw.map(&:split).find_all { |num, file, line|
+      trap_probe(probe, '[1,2,3,4]') { |_,rbfile,orig|
+        saw = orig.map(&:split).find_all { |num, file, line|
           file == rbfile && num == '4' && line == '1'
         }
-        assert_operator saw.length, :>, 0
+        assert_operator saw.length, :>, 0, orig
       }
     end
 
diff --git a/test/dtrace/test_function_entry.rb b/test/dtrace/test_function_entry.rb
index 2fac424fe4..0030560d54 100644
--- a/test/dtrace/test_function_entry.rb
+++ b/test/dtrace/test_function_entry.rb
@@ -17,7 +17,7 @@ ruby$target:::method-entry
 	  row.first == 'Foo'  && row[1] == 'foo'
 	}
 
-	assert_equal 10, foo_calls.length
+	assert_equal 10, foo_calls.length, probes
 	line = '3'
 	foo_calls.each { |f| assert_equal line, f[3] }
 	foo_calls.each { |f| assert_equal rb_file, f[2] }
@@ -38,7 +38,7 @@ ruby$target:::method-return
 	  row.first == 'Foo'  && row[1] == 'foo'
 	}
 
-	assert_equal 10, foo_calls.length
+	assert_equal 10, foo_calls.length, probes.inspect
 	line = '3'
 	foo_calls.each { |f| assert_equal line, f[3] }
 	foo_calls.each { |f| assert_equal rb_file, f[2] }
diff --git a/test/dtrace/test_hash_create.rb b/test/dtrace/test_hash_create.rb
index 83a4d0062c..603ee21872 100644
--- a/test/dtrace/test_hash_create.rb
+++ b/test/dtrace/test_hash_create.rb
@@ -22,11 +22,11 @@ module DTrace
     end
 
     def test_hash_lit_elements
-      trap_probe(probe, '{ :foo => :bar }') { |_,rbfile,saw|
-        saw = saw.map(&:split).find_all { |num, file, line|
+      trap_probe(probe, '{ :foo => :bar }') { |_,rbfile,orig|
+        saw = orig.map(&:split).find_all { |num, file, line|
           file == rbfile && num == '2'
         }
-        assert_operator saw.length, :>, 0
+        assert_operator saw.length, :>, 0, orig
       }
     end
 
diff --git a/test/dtrace/test_singleton_function.rb b/test/dtrace/test_singleton_function.rb
index a896b91975..ef1381a321 100644
--- a/test/dtrace/test_singleton_function.rb
+++ b/test/dtrace/test_singleton_function.rb
@@ -17,7 +17,7 @@ ruby$target:::method-entry
 	  row.first == 'Foo'  && row[1] == 'foo'
 	}
 
-	assert_equal 10, foo_calls.length
+	assert_equal 10, foo_calls.length, probes.inspect
 	line = '3'
 	foo_calls.each { |f| assert_equal line, f[3] }
 	foo_calls.each { |f| assert_equal rb_file, f[2] }
@@ -37,7 +37,7 @@ ruby$target:::method-return
 	  row.first == 'Foo'  && row[1] == 'foo'
 	}
 
-	assert_equal 10, foo_calls.length
+	assert_equal 10, foo_calls.length, probes.inspect
 	line = '3'
 	foo_calls.each { |f| assert_equal line, f[3] }
 	foo_calls.each { |f| assert_equal rb_file, f[2] }
diff --git a/test/dtrace/test_string.rb b/test/dtrace/test_string.rb
index 407280b1fc..a72f989f63 100644
--- a/test/dtrace/test_string.rb
+++ b/test/dtrace/test_string.rb
@@ -4,11 +4,11 @@ require_relative 'helper'
 module DTrace
   class TestStringProbes < TestCase
     def test_object_create_start_string_lit
-      trap_probe(probe, '"omglolwutbbq"') { |_,rbfile,saw|
-        saw = saw.map(&:split).find_all { |klass, file, line, len|
+      trap_probe(probe, '"omglolwutbbq"') { |_,rbfile,orig|
+        saw = orig.map(&:split).find_all { |klass, file, line, len|
           file == rbfile && len == '12' && line == '1'
         }
-        assert_equal(%w{ String }, saw.map(&:first))
+        assert_equal(%w{ String }, saw.map(&:first), orig.inspect)
         assert_equal([rbfile], saw.map { |line| line[1] })
         assert_equal(['1'], saw.map { |line| line[2] })
       }