diff --git a/src/com/xilinx/rapidwright/examples/PolynomialGenerator.java b/src/com/xilinx/rapidwright/examples/PolynomialGenerator.java
index 32d23667b..4ac719bcc 100644
--- a/src/com/xilinx/rapidwright/examples/PolynomialGenerator.java
+++ b/src/com/xilinx/rapidwright/examples/PolynomialGenerator.java
@@ -216,6 +216,10 @@ public static Map<String,Module> initializeOperators(Design d, int width) {
         return operators;
     }
 
+    public static void releaseOperators() {
+        operators = null;
+    }
+
     public static int sliceyOther;
     public static boolean setSliceY = false;
 
@@ -384,6 +388,8 @@ public static Design generatePolynomial(String polynomial, String name, int widt
 
         buildOperatorTree(p, d, results);
 
+        releaseOperators();
+
         d.addXDCConstraint(ConstraintGroup.LATE, "create_clock -name "+CLK_NAME+" -period 1.291 [get_ports "+CLK_NAME+"]");
         d.addXDCConstraint(ConstraintGroup.LATE, "set_property HD.CLK_SRC BUFGCE_X0Y18 [get_ports "+CLK_NAME+"]");
 
diff --git a/test/src/com/xilinx/rapidwright/design/TestDCPSave.java b/test/src/com/xilinx/rapidwright/design/TestDCPSave.java
index 9414b58c7..3700bf9c1 100644
--- a/test/src/com/xilinx/rapidwright/design/TestDCPSave.java
+++ b/test/src/com/xilinx/rapidwright/design/TestDCPSave.java
@@ -101,6 +101,6 @@ public void testWriteCheckpointPreWrittenEDIF(@TempDir Path tempDir) {
         Path dcpPath = tempDir.resolve("tmp.dcp");
         design.writeCheckpoint(dcpPath, edfPath, null);
 
-        VivadoToolsHelper.assertFullyRouted(design);
+        VivadoToolsHelper.assertFullyRouted(dcpPath);
     }
 }