diff --git a/src/server/scriptInfo.ts b/src/server/scriptInfo.ts
index defc28f7495..77329099871 100644
--- a/src/server/scriptInfo.ts
+++ b/src/server/scriptInfo.ts
@@ -64,7 +64,8 @@ namespace ts.server {
             this.switchToScriptVersionCache();
         }
 
-        public useText_TestOnly(newText?: string) {
+        /** Public for testing */
+        public useText(newText?: string) {
             this.svc = undefined;
             this.text = newText;
             this.lineMap = undefined;
@@ -90,22 +91,13 @@ namespace ts.server {
             // Reload always has fresh content
             this.pendingReloadFromDisk = false;
 
-            // We only need both this.text and this.fileSize if this.text
-            // is artificially empty because it was too large.
-            // We assume that an empty string passed to reload is not
-            // for a file that was too large to store.
-            this.fileSize = undefined;
-
             // If text changed set the text
             // This also ensures that if we had switched to version cache,
             // we are switching back to text.
             // The change to version cache will happen when needed
             // Thus avoiding the computation if there are no changes
             if (this.text !== newText) {
-                this.text = newText;
-                this.version.text++;
-                this.svc = undefined;
-                this.lineMap = undefined;
+                this.useText(newText);
                 // We cant guarantee new text is own file text
                 this.ownFileText = false;
                 return true;
diff --git a/src/testRunner/unittests/textStorage.ts b/src/testRunner/unittests/textStorage.ts
index b57d1109c7b..5dce083120b 100644
--- a/src/testRunner/unittests/textStorage.ts
+++ b/src/testRunner/unittests/textStorage.ts
@@ -18,7 +18,7 @@ namespace ts.textStorage {
             const ts2 = new server.TextStorage(host, server.asNormalizedPath(f.path), /*initialVersion*/ undefined, /*info*/undefined!);
 
             ts1.useScriptVersionCache_TestOnly();
-            ts2.useText_TestOnly();
+            ts2.useText();
 
             const lineMap = computeLineStarts(f.content);
 
@@ -57,7 +57,7 @@ namespace ts.textStorage {
             ts1.edit(0, 5, "   ");
             assert.isTrue(ts1.hasScriptVersionCache_TestOnly(), "have script version cache - 1");
 
-            ts1.useText_TestOnly();
+            ts1.useText();
             assert.isFalse(ts1.hasScriptVersionCache_TestOnly(), "should not have script version cache - 2");
 
             ts1.getLineInfo(0);
@@ -77,7 +77,7 @@ namespace ts.textStorage {
             // Since script info is not used in these tests, just cheat by passing undefined
             const ts1 = new server.TextStorage(host, server.asNormalizedPath(f.path), /*initialVersion*/ undefined, /*info*/undefined!);
 
-            ts1.useText_TestOnly(f.content);
+            ts1.useText(f.content);
             assert.isFalse(ts1.hasScriptVersionCache_TestOnly());
 
             assert.strictEqual(f.content.length, ts1.getTelemetryFileSize());