diff --git a/src/unparser.rs b/src/unparser.rs
index 01b0b58..8b6368f 100644
--- a/src/unparser.rs
+++ b/src/unparser.rs
@@ -1035,10 +1035,18 @@ impl Unparser {
 
             let has_single = escaped_source.contains("'");
             let has_double = escaped_source.contains("\"");
-            let has_single_doc = escaped_source.contains("'''");
-            if has_single && has_double && has_single_doc {
+
+            if has_single
+                && has_double
+                && escaped_source.starts_with("\"")
+                && escaped_source.ends_with("\"")
+            {
                 escaped_source = replace_first_and_last(&escaped_source, "\"\"\"")
-            } else if has_single && has_double {
+            } else if has_single
+                && has_double
+                && escaped_source.starts_with("'")
+                && escaped_source.ends_with("'")
+            {
                 escaped_source = replace_first_and_last(&escaped_source, "'''")
             } else if has_single {
                 escaped_source = replace_first_and_last(&escaped_source, "\"")
diff --git a/test_files/f_string.py b/test_files/f_string.py
index 8a4bb93..9bf4ea8 100644
--- a/test_files/f_string.py
+++ b/test_files/f_string.py
@@ -19,4 +19,7 @@
         for (k, v) in attribs.items() # noqa
     )
 )
+
+completion_init_lines = [f"source '{completion_path}'"] # noqa
+
 # fmt: on