diff --git a/tool/src/org/antlr/v4/tool/interp/ParserInterpreter.java b/tool/src/org/antlr/v4/tool/interp/ParserInterpreter.java
index a118f4a99..ecf1a78c5 100644
--- a/tool/src/org/antlr/v4/tool/interp/ParserInterpreter.java
+++ b/tool/src/org/antlr/v4/tool/interp/ParserInterpreter.java
@@ -101,14 +101,6 @@ public class ParserInterpreter {
 										  parser.sharedContextCache);
 	}
 
-	public synchronized int predictATN(@NotNull DFA dfa, @NotNull TokenStream input,
-									   @Nullable ParserRuleContext outerContext,
-									   boolean useContext)
-	{
-		// sync to ensure this entry doesn't race for dfa access
-		return atnSimulator.predictATN(dfa, input, outerContext);
-	}
-
 	public int adaptivePredict(@NotNull TokenStream input, int decision,
 							   @Nullable ParserRuleContext outerContext)
 	{
diff --git a/tool/test/org/antlr/v4/test/TestATNParserPrediction.java b/tool/test/org/antlr/v4/test/TestATNParserPrediction.java
index 1839df6e2..e1286a31f 100644
--- a/tool/test/org/antlr/v4/test/TestATNParserPrediction.java
+++ b/tool/test/org/antlr/v4/test/TestATNParserPrediction.java
@@ -489,11 +489,7 @@ public class TestATNParserPrediction extends BaseTest {
 //		ParserATNSimulator interp = new ParserATNSimulator(atn);
 		TokenStream input = new IntTokenStream(types);
 		ParserInterpreter interp = new ParserInterpreter(g, input);
-		DecisionState startState = atn.decisionToState.get(decision);
-		DFA dfa = new DFA(startState, decision);
-		int alt = interp.predictATN(dfa, input, ParserRuleContext.EMPTY, false);
-
-		System.out.println(dot.getDOT(dfa, false));
+		int alt = interp.adaptivePredict(input, decision, ParserRuleContext.EMPTY);
 
 		assertEquals(expectedAlt, alt);
 
@@ -507,44 +503,6 @@ public class TestATNParserPrediction extends BaseTest {
 		assertEquals(expectedAlt, alt);
 	}
 
-	public synchronized DFA getDFA(LexerGrammar lg, Grammar g, String ruleName,
-								   String inputString, ParserRuleContext ctx)
-	{
-		// sync to ensure multiple tests don't race on dfa access
-		Tool.internalOption_ShowATNConfigsInDFA = true;
-		ATN lexatn = createATN(lg, true);
-		LexerATNSimulator lexInterp = new LexerATNSimulator(lexatn,null,null);
-
-		semanticProcess(lg);
-		g.importVocab(lg);
-		semanticProcess(g);
-
-		ParserATNFactory f = new ParserATNFactory(g);
-		ATN atn = f.createATN();
-
-//		DOTGenerator dot = new DOTGenerator(g);
-//		System.out.println(dot.getDOT(atn.ruleToStartState.get(g.getRule("a"))));
-//		System.out.println(dot.getDOT(atn.ruleToStartState.get(g.getRule("b"))));
-//		System.out.println(dot.getDOT(atn.ruleToStartState.get(g.getRule("e"))));
-
-		ParserATNSimulator interp =
-			new ParserATNSimulator(atn, new DFA[atn.getNumberOfDecisions()],null);
-		IntegerList types = getTokenTypesViaATN(inputString, lexInterp);
-		System.out.println(types);
-		TokenStream input = new IntTokenStream(types);
-		try {
-			DecisionState startState = atn.decisionToState.get(0);
-			DFA dfa = new DFA(startState);
-//			Rule r = g.getRule(ruleName);
-			//ATNState startState = atn.ruleToStartState.get(r);
-			interp.predictATN(dfa, input, ctx);
-		}
-		catch (NoViableAltException nvae) {
-			nvae.printStackTrace(System.err);
-		}
-		return null;
-	}
-
 	public void checkDFAConstruction(LexerGrammar lg, Grammar g, int decision,
 									 String[] inputString, String[] dfaString)
 	{