diff --git a/ql/test/query-tests/Security/CWE-020/SuspiciousCharacterInRegexp/SuspiciousCharacterInRegexp.expected b/ql/test/query-tests/Security/CWE-020/SuspiciousCharacterInRegexp/SuspiciousCharacterInRegexp.expected
index 0d6d90255ee..d001d1ab5b4 100644
--- a/ql/test/query-tests/Security/CWE-020/SuspiciousCharacterInRegexp/SuspiciousCharacterInRegexp.expected
+++ b/ql/test/query-tests/Security/CWE-020/SuspiciousCharacterInRegexp/SuspiciousCharacterInRegexp.expected
@@ -1,13 +1,25 @@
 edges
 nodes
 | SuspiciousCharacterInRegexp.go:6:34:6:55 | "\\bforbidden.host.org" | semmle.label | "\\bforbidden.host.org" |
-| test.go:8:21:8:34 | "hello\\aworld" | semmle.label | "hello\\aworld" |
-| test.go:9:21:9:36 | "hello\\\\\\aworld" | semmle.label | "hello\\\\\\aworld" |
-| test.go:10:21:10:34 | "hello\\bworld" | semmle.label | "hello\\bworld" |
-| test.go:11:21:11:36 | "hello\\\\\\bworld" | semmle.label | "hello\\\\\\bworld" |
+| test.go:7:21:7:24 | "\\a" | semmle.label | "\\a" |
+| test.go:9:21:9:26 | "\\\\\\a" | semmle.label | "\\\\\\a" |
+| test.go:10:21:10:27 | "x\\\\\\a" | semmle.label | "x\\\\\\a" |
+| test.go:12:21:12:28 | "\\\\\\\\\\a" | semmle.label | "\\\\\\\\\\a" |
+| test.go:14:21:14:30 | "\\\\\\\\\\\\\\a" | semmle.label | "\\\\\\\\\\\\\\a" |
+| test.go:16:21:16:32 | "\\\\\\\\\\\\\\\\\\a" | semmle.label | "\\\\\\\\\\\\\\\\\\a" |
+| test.go:20:21:20:34 | "hello\\aworld" | semmle.label | "hello\\aworld" |
+| test.go:21:21:21:36 | "hello\\\\\\aworld" | semmle.label | "hello\\\\\\aworld" |
+| test.go:22:21:22:34 | "hello\\bworld" | semmle.label | "hello\\bworld" |
+| test.go:23:21:23:36 | "hello\\\\\\bworld" | semmle.label | "hello\\\\\\bworld" |
 #select
 | SuspiciousCharacterInRegexp.go:6:34:6:55 | "\\bforbidden.host.org" | SuspiciousCharacterInRegexp.go:6:34:6:55 | "\\bforbidden.host.org" | SuspiciousCharacterInRegexp.go:6:34:6:55 | "\\bforbidden.host.org" | $@ used $@ contains a literal backspace \\b; did you mean \\\\b, a word boundary? | SuspiciousCharacterInRegexp.go:6:34:6:55 | "\\bforbidden.host.org" | A regular expression | SuspiciousCharacterInRegexp.go:6:34:6:55 | "\\bforbidden.host.org" | here |
-| test.go:8:21:8:34 | "hello\\aworld" | test.go:8:21:8:34 | "hello\\aworld" | test.go:8:21:8:34 | "hello\\aworld" | $@ used $@ contains the bell character \\a; did you mean \\\\a, the Vim alphabetic character class (use [[:alpha:]] instead) or \\\\A, the beginning of text? | test.go:8:21:8:34 | "hello\\aworld" | A regular expression | test.go:8:21:8:34 | "hello\\aworld" | here |
-| test.go:9:21:9:36 | "hello\\\\\\aworld" | test.go:9:21:9:36 | "hello\\\\\\aworld" | test.go:9:21:9:36 | "hello\\\\\\aworld" | $@ used $@ contains the bell character \\a; did you mean \\\\a, the Vim alphabetic character class (use [[:alpha:]] instead) or \\\\A, the beginning of text? | test.go:9:21:9:36 | "hello\\\\\\aworld" | A regular expression | test.go:9:21:9:36 | "hello\\\\\\aworld" | here |
-| test.go:10:21:10:34 | "hello\\bworld" | test.go:10:21:10:34 | "hello\\bworld" | test.go:10:21:10:34 | "hello\\bworld" | $@ used $@ contains a literal backspace \\b; did you mean \\\\b, a word boundary? | test.go:10:21:10:34 | "hello\\bworld" | A regular expression | test.go:10:21:10:34 | "hello\\bworld" | here |
-| test.go:11:21:11:36 | "hello\\\\\\bworld" | test.go:11:21:11:36 | "hello\\\\\\bworld" | test.go:11:21:11:36 | "hello\\\\\\bworld" | $@ used $@ contains a literal backspace \\b; did you mean \\\\b, a word boundary? | test.go:11:21:11:36 | "hello\\\\\\bworld" | A regular expression | test.go:11:21:11:36 | "hello\\\\\\bworld" | here |
+| test.go:7:21:7:24 | "\\a" | test.go:7:21:7:24 | "\\a" | test.go:7:21:7:24 | "\\a" | $@ used $@ contains the bell character \\a; did you mean \\\\a, the Vim alphabetic character class (use [[:alpha:]] instead) or \\\\A, the beginning of text? | test.go:7:21:7:24 | "\\a" | A regular expression | test.go:7:21:7:24 | "\\a" | here |
+| test.go:9:21:9:26 | "\\\\\\a" | test.go:9:21:9:26 | "\\\\\\a" | test.go:9:21:9:26 | "\\\\\\a" | $@ used $@ contains the bell character \\a; did you mean \\\\a, the Vim alphabetic character class (use [[:alpha:]] instead) or \\\\A, the beginning of text? | test.go:9:21:9:26 | "\\\\\\a" | A regular expression | test.go:9:21:9:26 | "\\\\\\a" | here |
+| test.go:10:21:10:27 | "x\\\\\\a" | test.go:10:21:10:27 | "x\\\\\\a" | test.go:10:21:10:27 | "x\\\\\\a" | $@ used $@ contains the bell character \\a; did you mean \\\\a, the Vim alphabetic character class (use [[:alpha:]] instead) or \\\\A, the beginning of text? | test.go:10:21:10:27 | "x\\\\\\a" | A regular expression | test.go:10:21:10:27 | "x\\\\\\a" | here |
+| test.go:12:21:12:28 | "\\\\\\\\\\a" | test.go:12:21:12:28 | "\\\\\\\\\\a" | test.go:12:21:12:28 | "\\\\\\\\\\a" | $@ used $@ contains the bell character \\a; did you mean \\\\a, the Vim alphabetic character class (use [[:alpha:]] instead) or \\\\A, the beginning of text? | test.go:12:21:12:28 | "\\\\\\\\\\a" | A regular expression | test.go:12:21:12:28 | "\\\\\\\\\\a" | here |
+| test.go:14:21:14:30 | "\\\\\\\\\\\\\\a" | test.go:14:21:14:30 | "\\\\\\\\\\\\\\a" | test.go:14:21:14:30 | "\\\\\\\\\\\\\\a" | $@ used $@ contains the bell character \\a; did you mean \\\\a, the Vim alphabetic character class (use [[:alpha:]] instead) or \\\\A, the beginning of text? | test.go:14:21:14:30 | "\\\\\\\\\\\\\\a" | A regular expression | test.go:14:21:14:30 | "\\\\\\\\\\\\\\a" | here |
+| test.go:16:21:16:32 | "\\\\\\\\\\\\\\\\\\a" | test.go:16:21:16:32 | "\\\\\\\\\\\\\\\\\\a" | test.go:16:21:16:32 | "\\\\\\\\\\\\\\\\\\a" | $@ used $@ contains the bell character \\a; did you mean \\\\a, the Vim alphabetic character class (use [[:alpha:]] instead) or \\\\A, the beginning of text? | test.go:16:21:16:32 | "\\\\\\\\\\\\\\\\\\a" | A regular expression | test.go:16:21:16:32 | "\\\\\\\\\\\\\\\\\\a" | here |
+| test.go:20:21:20:34 | "hello\\aworld" | test.go:20:21:20:34 | "hello\\aworld" | test.go:20:21:20:34 | "hello\\aworld" | $@ used $@ contains the bell character \\a; did you mean \\\\a, the Vim alphabetic character class (use [[:alpha:]] instead) or \\\\A, the beginning of text? | test.go:20:21:20:34 | "hello\\aworld" | A regular expression | test.go:20:21:20:34 | "hello\\aworld" | here |
+| test.go:21:21:21:36 | "hello\\\\\\aworld" | test.go:21:21:21:36 | "hello\\\\\\aworld" | test.go:21:21:21:36 | "hello\\\\\\aworld" | $@ used $@ contains the bell character \\a; did you mean \\\\a, the Vim alphabetic character class (use [[:alpha:]] instead) or \\\\A, the beginning of text? | test.go:21:21:21:36 | "hello\\\\\\aworld" | A regular expression | test.go:21:21:21:36 | "hello\\\\\\aworld" | here |
+| test.go:22:21:22:34 | "hello\\bworld" | test.go:22:21:22:34 | "hello\\bworld" | test.go:22:21:22:34 | "hello\\bworld" | $@ used $@ contains a literal backspace \\b; did you mean \\\\b, a word boundary? | test.go:22:21:22:34 | "hello\\bworld" | A regular expression | test.go:22:21:22:34 | "hello\\bworld" | here |
+| test.go:23:21:23:36 | "hello\\\\\\bworld" | test.go:23:21:23:36 | "hello\\\\\\bworld" | test.go:23:21:23:36 | "hello\\\\\\bworld" | $@ used $@ contains a literal backspace \\b; did you mean \\\\b, a word boundary? | test.go:23:21:23:36 | "hello\\\\\\bworld" | A regular expression | test.go:23:21:23:36 | "hello\\\\\\bworld" | here |
diff --git a/ql/test/query-tests/Security/CWE-020/SuspiciousCharacterInRegexp/test.go b/ql/test/query-tests/Security/CWE-020/SuspiciousCharacterInRegexp/test.go
index 5e8d8c1576a..ff3da9b8496 100644
--- a/ql/test/query-tests/Security/CWE-020/SuspiciousCharacterInRegexp/test.go
+++ b/ql/test/query-tests/Security/CWE-020/SuspiciousCharacterInRegexp/test.go
@@ -3,6 +3,18 @@ package main
 import "regexp"
 
 func main() {
+	// many backslashes
+	regexp.MustCompile("\a") // BAD
+	regexp.MustCompile("\\a")
+	regexp.MustCompile("\\\a")  // BAD
+	regexp.MustCompile("x\\\a") // BAD
+	regexp.MustCompile("\\\\a")
+	regexp.MustCompile("\\\\\a") // BAD
+	regexp.MustCompile("\\\\\\a")
+	regexp.MustCompile("\\\\\\\a") // BAD
+	regexp.MustCompile("\\\\\\\\a")
+	regexp.MustCompile("\\\\\\\\\a") // BAD
+	regexp.MustCompile("\\\\\\\\\\a")
 
 	// BAD: probably a mistake:
 	regexp.MustCompile("hello\aworld")