diff --git a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/ExpectedTestOutput.test b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/ExpectedTestOutput.test
index dc5be133758935e9793c7928f2c44168ad2c843e..220f7f24f81a8ba6ed0b6719da27cb0385fdbfe8 100644
--- a/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/ExpectedTestOutput.test
+++ b/com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/ExpectedTestOutput.test
@@ -25383,6 +25383,61 @@ attr(,"useBytes")
 [1] TRUE
 
 
+##com.oracle.truffle.r.test.builtins.TestBuiltin_gregexpr.testRegExpr#Output.IgnoreErrorMessage#
+#gregexpr('(', 'abc()', fixed = FALSE)
+Error in gregexpr("(", "abc()", fixed = FALSE) :
+  invalid regular expression '(', reason 'Missing ')''
+
+##com.oracle.truffle.r.test.builtins.TestBuiltin_gregexpr.testRegExpr#
+#gregexpr('(', 'abc()', fixed = TRUE)
+[[1]]
+[1] 4
+attr(,"match.length")
+[1] 1
+attr(,"useBytes")
+[1] TRUE
+
+
+##com.oracle.truffle.r.test.builtins.TestBuiltin_gregexpr.testRegExpr#
+#gregexpr(')', 'abc()', fixed = FALSE)
+[[1]]
+[1] 5
+attr(,"match.length")
+[1] 1
+attr(,"useBytes")
+[1] TRUE
+
+
+##com.oracle.truffle.r.test.builtins.TestBuiltin_gregexpr.testRegExpr#
+#gregexpr(')', 'abc()', fixed = TRUE)
+[[1]]
+[1] 5
+attr(,"match.length")
+[1] 1
+attr(,"useBytes")
+[1] TRUE
+
+
+##com.oracle.truffle.r.test.builtins.TestBuiltin_gregexpr.testRegExpr#
+#gregexpr('\\(', 'abc()', fixed = FALSE)
+[[1]]
+[1] 4
+attr(,"match.length")
+[1] 1
+attr(,"useBytes")
+[1] TRUE
+
+
+##com.oracle.truffle.r.test.builtins.TestBuiltin_gregexpr.testRegExpr#
+#gregexpr('\\)', 'abc()', fixed = FALSE)
+[[1]]
+[1] 5
+attr(,"match.length")
+[1] 1
+attr(,"useBytes")
+[1] TRUE
+
+
 ##com.oracle.truffle.r.test.builtins.TestBuiltin_gregexpr.testRegExpr#
 #{ .Internal(gregexpr("7", 42, F, F, F, F)) }
 Error: invalid 'text' argument
@@ -47596,6 +47651,51 @@ attr(,"match.length")
 attr(,"useBytes")
 [1] TRUE
 
+##com.oracle.truffle.r.test.builtins.TestBuiltin_regexpr.testRegExpr#Output.IgnoreErrorMessage#
+#regexpr('(', 'abc()', fixed = FALSE)
+Error in regexpr("(", "abc()", fixed = FALSE) :
+  invalid regular expression '(', reason 'Missing ')''
+
+##com.oracle.truffle.r.test.builtins.TestBuiltin_regexpr.testRegExpr#
+#regexpr('(', 'abc()', fixed = TRUE)
+[1] 4
+attr(,"match.length")
+[1] 1
+attr(,"useBytes")
+[1] TRUE
+
+##com.oracle.truffle.r.test.builtins.TestBuiltin_regexpr.testRegExpr#
+#regexpr(')', 'abc()', fixed = FALSE)
+[1] 5
+attr(,"match.length")
+[1] 1
+attr(,"useBytes")
+[1] TRUE
+
+##com.oracle.truffle.r.test.builtins.TestBuiltin_regexpr.testRegExpr#
+#regexpr(')', 'abc()', fixed = TRUE)
+[1] 5
+attr(,"match.length")
+[1] 1
+attr(,"useBytes")
+[1] TRUE
+
+##com.oracle.truffle.r.test.builtins.TestBuiltin_regexpr.testRegExpr#
+#regexpr('\\(', 'abc()', fixed = FALSE)
+[1] 4
+attr(,"match.length")
+[1] 1
+attr(,"useBytes")
+[1] TRUE
+
+##com.oracle.truffle.r.test.builtins.TestBuiltin_regexpr.testRegExpr#
+#regexpr('\\)', 'abc()', fixed = FALSE)
+[1] 5
+attr(,"match.length")
+[1] 1
+attr(,"useBytes")
+[1] TRUE
+
 ##com.oracle.truffle.r.test.builtins.TestBuiltin_regexpr.testRegExpr#
 #{ .Internal(regexpr("7", 42, F, F, F, F)) }
 Error: invalid 'text' argument