diff --git a/src/printer.js b/src/printer.js
index 0eca71ae..465b4729 100644
--- a/src/printer.js
+++ b/src/printer.js
@@ -729,7 +729,7 @@ function genericPrintNoParens(path, options, print) {
     case "NullLiteral":
       return "null"; // Babel 6 Literal split
     case "RegExpLiteral":
-      return n.extra.raw;
+      return printRegex(n);
     // Babel 6 Literal split
     case "NumericLiteral":
       return printNumber(n.extra.raw);
@@ -739,6 +739,7 @@ function genericPrintNoParens(path, options, print) {
     case "StringLiteral":
     case "Literal":
       if (typeof n.value === "number") return printNumber(n.raw);
+      if (n.regex) return printRegex(n.regex);
       if (typeof n.value !== "string") return "" + n.value;
 
       return nodeStr(n, options); // Babel 6
@@ -1233,7 +1234,10 @@ function genericPrintNoParens(path, options, print) {
     case "ClassExpression":
       return concat(printClass(path, options, print));
     case "TemplateElement":
-      return join(literalline, n.value.raw.split("\n"));
+      return join(
+        literalline,
+        n.value.raw.split("\n").map(line => normalizeEscapes(line))
+      );
     case "TemplateLiteral":
       var expressions = path.map(print, "expressions");
 
@@ -2524,7 +2528,37 @@ function makeString(rawContent, enclosingQuote) {
     return match;
   });
 
-  return enclosingQuote + newContent + enclosingQuote;
+  return enclosingQuote + normalizeEscapes(newContent) + enclosingQuote;
+}
+
+function printRegex(regexData) {
+  const pattern = regexData.pattern;
+  const flags = regexData.flags;
+  const skipES2015 = !flags.includes("u");
+
+  return "/" + normalizeEscapes(pattern, skipES2015) + "/" + flags;
+}
+
+function normalizeEscapes(rawContent, skipES2015) {
+  // Matches \x escapes and \u escapes (including the ES2015 variant) and other
+  // escapes.
+  const regex = /(\\x[\da-f]{2}|\\u[\da-f]{4}|\\u\{[\da-f]+\})|(\\[\s\S])/gi;
+
+  return rawContent.replace(regex, (match, escape, otherEscape) => {
+    // Return other escapes as-is.
+    if (otherEscape) {
+      return otherEscape;
+    }
+
+    // Regexes without the /u flag do not support ES2015 unicode escapes, so
+    // return the match as-is.
+    if (skipES2015 && escape[2] === "{") {
+      return escape;
+    }
+
+    // Print all \x and \u escapes lowercase.
+    return escape.toLowerCase();
+  });
 }
 
 function printNumber(rawNumber) {
diff --git a/tests/literal/__snapshots__/jsfmt.spec.js.snap b/tests/literal/__snapshots__/jsfmt.spec.js.snap
index 9e26c22a..458f8170 100644
--- a/tests/literal/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/literal/__snapshots__/jsfmt.spec.js.snap
@@ -116,3 +116,48 @@ function test5(): string {
 0.1e-10;
 "
 `;
+
+exports[`test regex.js 1`] = `
+"// Normalization of \\x and \\u escapes:
+
+// Basic case.
+/a\\xAaAb\\uB1cDE/gim;
+
+// ES2015 unicode escapes.
+/\\u{1Fa3}/u;
+/\\u{00000000A0}/u;
+
+// Leaves what looks like a ES2015 unicode escape alone if not using the /u flag.
+/\\u{1Fa3}/;
+
+// Leaves what looks like escapes but aren\'t alone.
+/\\xA\\u00BG/;
+
+// Leaves other escapes alone.
+/\\B\\S/;
+
+// Handles escaped backslashes.
+/\\\\xAB\\\\\\xAB\\\\\\\\xAB\\B\\\\\\B\\uAbCd/;
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+// Normalization of \\x and \\u escapes:
+
+// Basic case.
+/a\\xaaAb\\ub1cdE/gim;
+
+// ES2015 unicode escapes.
+/\\u{1fa3}/u;
+/\\u{00000000a0}/u;
+
+// Leaves what looks like a ES2015 unicode escape alone if not using the /u flag.
+/\\u{1Fa3}/;
+
+// Leaves what looks like escapes but aren\'t alone.
+/\\xA\\u00BG/;
+
+// Leaves other escapes alone.
+/\\B\\S/;
+
+// Handles escaped backslashes.
+/\\\\xAB\\\\\\xab\\\\\\\\xAB\\B\\\\\\B\\uabcd/;
+"
+`;
diff --git a/tests/literal/regex.js b/tests/literal/regex.js
new file mode 100644
index 00000000..30a7b047
--- /dev/null
+++ b/tests/literal/regex.js
@@ -0,0 +1,20 @@
+// Normalization of \x and \u escapes:
+
+// Basic case.
+/a\xAaAb\uB1cDE/gim;
+
+// ES2015 unicode escapes.
+/\u{1Fa3}/u;
+/\u{00000000A0}/u;
+
+// Leaves what looks like a ES2015 unicode escape alone if not using the /u flag.
+/\u{1Fa3}/;
+
+// Leaves what looks like escapes but aren't alone.
+/\xA\u00BG/;
+
+// Leaves other escapes alone.
+/\B\S/;
+
+// Handles escaped backslashes.
+/\\xAB\\\xAB\\\\xAB\B\\\B\uAbCd/;
diff --git a/tests/strings/__snapshots__/jsfmt.spec.js.snap b/tests/strings/__snapshots__/jsfmt.spec.js.snap
index b75363d4..7707b472 100644
--- a/tests/strings/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/strings/__snapshots__/jsfmt.spec.js.snap
@@ -24,6 +24,29 @@ exports[`test strings.js 1`] = `
 
   \'\\uD801\\uDC28\',
 ];
+
+// Normalization of \\x and \\u escapes:
+
+// Basic case.
+\"a\\xAaAb\\uB1cDE\";
+\`a\\xAaAb\\uB1cDE\`;
+
+// ES2015 unicode escapes.
+\"\\u{1Fa3}\";
+\`\\u{1Fa3}\`;
+\"\\u{00000000A0}\";
+\`\\u{00000000A0}\`;
+
+// Leaves other escapes alone.
+\"\\B\\S\";
+\`\\B\\S\`;
+
+// Handles escaped backslashes.
+\"\\\\xAB\\\\\\xAB\\\\\\\\xAB\\B\\\\\\B\\u1234\";
+\`\\\\xAB\\\\\\xAB\\\\\\\\xAB\\B\\\\\\B\\u1234\`;
+
+// Mix of everything.
+\"\\xF0\"\`a\\uaBcD\${\'\\xFdE\'}\\\\\\u{00AbCdE}\`;
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 [
   \"abc\",
@@ -42,6 +65,17 @@ exports[`test strings.js 1`] = `
   \"\\0\",
   \"🐶\",
   \'\\uD801\\uDC28\'
-];
+]; // Normalization of \\x and \\u escapes: // Basic case.
+\"a\\xaaAb\\ub1cdE\";
+\`a\\xaaAb\\ub1cdE\`; // ES2015 unicode escapes.
+\"\\u{1fa3}\";
+\`\\u{1fa3}\`;
+\"\\u{00000000a0}\";
+\`\\u{00000000a0}\`; // Leaves other escapes alone.
+\"\\B\\S\";
+\`\\B\\S\`; // Handles escaped backslashes.
+\"\\\\xAB\\\\\\xab\\\\\\\\xAB\\B\\\\\\B\\u1234\";
+\`\\\\xAB\\\\\\xab\\\\\\\\xAB\\B\\\\\\B\\u1234\`; // Mix of everything.
+\"\\xf0\"\`a\\uabcd\${\"\\xfdE\"}\\\\\\u{00abcde}\`;
 "
 `;
diff --git a/tests/strings/strings.js b/tests/strings/strings.js
index d31dceb2..c2722e2b 100644
--- a/tests/strings/strings.js
+++ b/tests/strings/strings.js
@@ -23,3 +23,26 @@
 
   '\uD801\uDC28',
 ];
+
+// Normalization of \x and \u escapes:
+
+// Basic case.
+"a\xAaAb\uB1cDE";
+`a\xAaAb\uB1cDE`;
+
+// ES2015 unicode escapes.
+"\u{1Fa3}";
+`\u{1Fa3}`;
+"\u{00000000A0}";
+`\u{00000000A0}`;
+
+// Leaves other escapes alone.
+"\B\S";
+`\B\S`;
+
+// Handles escaped backslashes.
+"\\xAB\\\xAB\\\\xAB\B\\\B\u1234";
+`\\xAB\\\xAB\\\\xAB\B\\\B\u1234`;
+
+// Mix of everything.
+"\xF0"`a\uaBcD${'\xFdE'}\\\u{00AbCdE}`;