diff --git a/plugin/trino-bigquery/src/main/java/io/trino/plugin/bigquery/BigQueryType.java b/plugin/trino-bigquery/src/main/java/io/trino/plugin/bigquery/BigQueryType.java
index 157ef6ab2b4c..1838da94c5b2 100644
--- a/plugin/trino-bigquery/src/main/java/io/trino/plugin/bigquery/BigQueryType.java
+++ b/plugin/trino-bigquery/src/main/java/io/trino/plugin/bigquery/BigQueryType.java
@@ -176,8 +176,8 @@ private static OptionalToStringConverter unsupportedToStringConverter()
     @VisibleForTesting
     public static String dateToStringConverter(Object value)
     {
-        LocalDate date = LocalDate.ofEpochDay(((Long) value).longValue());
-        return quote(date.toString());
+        LocalDate date = LocalDate.ofEpochDay((long) value);
+        return "'" + date + "'";
     }
 
     private static String datetimeToStringConverter(Object value)
@@ -223,8 +223,10 @@ private static ZonedDateTime toZonedDateTime(long epochSeconds, long nanoAdjustm
     static String stringToStringConverter(Object value)
     {
         Slice slice = (Slice) value;
-        // TODO (https://github.com/trinodb/trino/issues/7900) Add support for all String and Bytes literals
-        return quote(slice.toStringUtf8().replace("'", "\\'"));
+        return "'%s'".formatted(slice.toStringUtf8()
+                .replace("\\", "\\\\")
+                .replace("\n", "\\n")
+                .replace("'", "\\'"));
     }
 
     static String numericToStringConverter(Object value)
@@ -314,11 +316,6 @@ private static StandardSQLTypeName toStandardSqlTypeName(Type type)
         throw new TrinoException(NOT_SUPPORTED, "Unsupported column type: " + type.getDisplayName());
     }
 
-    private static String quote(String value)
-    {
-        return "'" + value + "'";
-    }
-
     public Optional<String> convertToString(Type type, Object value)
     {
         if (type instanceof ArrayType) {
diff --git a/testing/trino-testing/src/main/java/io/trino/testing/BaseConnectorTest.java b/testing/trino-testing/src/main/java/io/trino/testing/BaseConnectorTest.java
index f4a9aead9ffc..2eec3bad2564 100644
--- a/testing/trino-testing/src/main/java/io/trino/testing/BaseConnectorTest.java
+++ b/testing/trino-testing/src/main/java/io/trino/testing/BaseConnectorTest.java
@@ -4156,7 +4156,9 @@ private List<DataMappingTestSetup> testDataMappingSmokeTestData()
                 .add(new DataMappingTestSetup("char(3)", "'ab'", "'zzz'"))
                 .add(new DataMappingTestSetup("varchar(3)", "'de'", "'zzz'"))
                 .add(new DataMappingTestSetup("varchar", "'łąka for the win'", "'ŻŻŻŻŻŻŻŻŻŻ'"))
-                .add(new DataMappingTestSetup("varchar", "'a \\backslash'", "'a a'")) // `a` sorts after `\`
+                .add(new DataMappingTestSetup("varchar", "'a \\backslash'", "'a a'")) // `a` sorts after `\`; \b may be interpreted as an escape sequence
+                .add(new DataMappingTestSetup("varchar", "'end backslash \\'", "'end backslash a'")) // `a` sorts after `\`; final \ before end quote may confuse a parser
+                .add(new DataMappingTestSetup("varchar", "U&'a \\000a newline'", "'a a'")) // `a` sorts after `\n`; newlines can require special handling in a remote system's language
                 .add(new DataMappingTestSetup("varbinary", "X'12ab3f'", "X'ffffffffffffffffffff'"))
                 .build();
     }
@@ -4877,8 +4879,9 @@ public DataMappingTestSetup asUnsupported()
         @Override
         public String toString()
         {
-            // toString is brief because it's used for test case labels in IDE
-            return trinoTypeName + (unsupportedType ? "!" : "");
+            // Used for test case labels in IDE
+            return trinoTypeName + (unsupportedType ? "!" : "") +
+                    ":" + sampleValueLiteral.replaceAll("[^a-zA-Z0-9_-]", "");
         }
     }
 }