diff --git a/src/language/__tests__/.blockString-test.js.swp b/src/language/__tests__/.blockString-test.js.swp
new file mode 100644
index 0000000000..bbad20578d
Binary files /dev/null and b/src/language/__tests__/.blockString-test.js.swp differ
diff --git a/src/language/__tests__/blockString-test.js b/src/language/__tests__/blockString-test.js
index dced428f3a..efd7abbd45 100644
--- a/src/language/__tests__/blockString-test.js
+++ b/src/language/__tests__/blockString-test.js
@@ -155,6 +155,13 @@ describe('printBlockString', () => {
     );
   });
 
+  it('correctly prints single-line with trailing backslash', () => {
+    const str = 'backslash \\';
+
+    expect(printBlockString(str)).to.equal('"""\nbackslash \\\n"""');
+    expect(printBlockString(str, '', true)).to.equal('"""\nbackslash \\\n"""');
+  });
+
   it('correctly prints string with a first line indentation', () => {
     const str = joinLines(
       '    first  ',
diff --git a/src/language/blockString.js b/src/language/blockString.js
index dba151a125..d8ec8fb49d 100644
--- a/src/language/blockString.js
+++ b/src/language/blockString.js
@@ -85,8 +85,12 @@ export function printBlockString(
   const isSingleLine = value.indexOf('\n') === -1;
   const hasLeadingSpace = value[0] === ' ' || value[0] === '\t';
   const hasTrailingQuote = value[value.length - 1] === '"';
+  const hasTrailingSlash = value[value.length - 1] === '\\';
   const printAsMultipleLines =
-    !isSingleLine || hasTrailingQuote || preferMultipleLines;
+    !isSingleLine ||
+    hasTrailingQuote ||
+    hasTrailingSlash ||
+    preferMultipleLines;
 
   let result = '';
   // Format a multi-line block quote to account for leading space.