diff --git a/tests/basics/bytes.py b/tests/basics/bytes.py
index 0b6b14fa55bb..ba14c26da8de 100644
--- a/tests/basics/bytes.py
+++ b/tests/basics/bytes.py
@@ -2,7 +2,6 @@
 print(b'123')
 print(br'123')
 print(rb'123')
-print(b'\u1234')
 
 # construction
 print(bytes())
diff --git a/tests/basics/bytes_escape_unicode.py b/tests/basics/bytes_escape_unicode.py
new file mode 100644
index 000000000000..1e450696f4f4
--- /dev/null
+++ b/tests/basics/bytes_escape_unicode.py
@@ -0,0 +1,3 @@
+# Coverage test for unicode escape in a bytes literal.
+# CPython issues a SyntaxWarning for this.
+print(b"\u1234")
diff --git a/tests/basics/bytes_escape_unicode.py.exp b/tests/basics/bytes_escape_unicode.py.exp
new file mode 100644
index 000000000000..6affe51896eb
--- /dev/null
+++ b/tests/basics/bytes_escape_unicode.py.exp
@@ -0,0 +1 @@
+b'\\u1234'
diff --git a/tests/basics/string1.py b/tests/basics/string1.py
index b3abfb9c608b..ca8dfd5399a5 100644
--- a/tests/basics/string1.py
+++ b/tests/basics/string1.py
@@ -5,7 +5,6 @@
 print(r'abc')
 print(u'abc')
 print(repr('\a\b\t\n\v\f\r'))
-print('\z') # unrecognised escape char
 
 # construction
 print(str())
diff --git a/tests/basics/string_escape_invalid.py b/tests/basics/string_escape_invalid.py
new file mode 100644
index 000000000000..d9fdd6e54658
--- /dev/null
+++ b/tests/basics/string_escape_invalid.py
@@ -0,0 +1,4 @@
+# Test invalid escape characters.
+# CPython issues a SyntaxWarning for this.
+
+print("\z")
diff --git a/tests/basics/string_escape_invalid.py.exp b/tests/basics/string_escape_invalid.py.exp
new file mode 100644
index 000000000000..c642929c6e84
--- /dev/null
+++ b/tests/basics/string_escape_invalid.py.exp
@@ -0,0 +1 @@
+\z
diff --git a/tests/basics/string_fstring.py b/tests/basics/string_fstring.py
index 1a3960680e4f..42d093b37b50 100644
--- a/tests/basics/string_fstring.py
+++ b/tests/basics/string_fstring.py
@@ -29,21 +29,6 @@ def foo(a, b):
 # Nested '{' and '}' characters.
 print(f"a{ {0,1,2}}")
 
-# PEP-0498 specifies that '\\' and '#' must be disallowed explicitly, whereas
-# MicroPython relies on the syntax error as a result of the substitution.
-
-print(f"\\")
-print(f'#')
-try:
-    eval("f'{\}'")
-except SyntaxError:
-    print('SyntaxError')
-try:
-    eval("f'{#}'")
-except SyntaxError:
-    print('SyntaxError')
-
-
 # PEP-0498 specifies that handling of double braces '{{' or '}}' should
 # behave like str.format.
 print(f'{{}}')
diff --git a/tests/basics/string_fstring_invalid.py b/tests/basics/string_fstring_invalid.py
new file mode 100644
index 000000000000..6fce323c5bce
--- /dev/null
+++ b/tests/basics/string_fstring_invalid.py
@@ -0,0 +1,13 @@
+# PEP-0498 specifies that '\\' and '#' must be disallowed explicitly, whereas
+# MicroPython relies on the syntax error as a result of the substitution.
+
+print(f"\\")
+print(f"#")
+try:
+    eval("f'{\}'")
+except SyntaxError:
+    print("SyntaxError")
+try:
+    eval("f'{#}'")
+except SyntaxError:
+    print("SyntaxError")
diff --git a/tests/basics/string_fstring_invalid.py.exp b/tests/basics/string_fstring_invalid.py.exp
new file mode 100644
index 000000000000..bcb7f259e556
--- /dev/null
+++ b/tests/basics/string_fstring_invalid.py.exp
@@ -0,0 +1,4 @@
+\
+#
+SyntaxError
+SyntaxError