diff --git a/tests/liberty/XNOR2X1.lib.verilogsim.ok b/tests/liberty/XNOR2X1.lib.verilogsim.ok
index 89e55e8b8..6c9ec26dd 100644
--- a/tests/liberty/XNOR2X1.lib.verilogsim.ok
+++ b/tests/liberty/XNOR2X1.lib.verilogsim.ok
@@ -2,5 +2,5 @@ module XNOR2X1 (B, A, Y);
   input B;
   input A;
   output Y;
-  assign Y = !(B&!A|!B&A); // "!(B&!A|!B&A)"
+  assign Y = (~((B&(~A))|((~B)&A))); // "!(B&!A|!B&A)"
 endmodule
diff --git a/tests/liberty/dff.lib b/tests/liberty/dff.lib
index 61f5966f5..b5df36587 100644
--- a/tests/liberty/dff.lib
+++ b/tests/liberty/dff.lib
@@ -5,7 +5,7 @@ library(dff) {
     area : 1;
     ff("IQ", "IQN") {
       next_state : "(D)";
-      clocked_on : "CLK";
+      clocked_on : (CLK);
     } 
     pin(D) {
       direction : input;
@@ -15,7 +15,7 @@ library(dff) {
     }
     pin(Q) {
       direction: output;
-      function : "IQ";   
+      function : IQ;   
     }
   }
 
diff --git a/tests/liberty/dff.lib.filtered.ok b/tests/liberty/dff.lib.filtered.ok
index b7dcb96be..2c2804ca1 100644
--- a/tests/liberty/dff.lib.filtered.ok
+++ b/tests/liberty/dff.lib.filtered.ok
@@ -3,7 +3,7 @@ library(dff) {
     area : 1 ;
     ff("IQ", "IQN") {
       next_state : "(D)" ;
-      clocked_on : "CLK" ;
+      clocked_on :  ( CLK ) ;
     }
     pin(D) {
       direction : input ;
@@ -13,7 +13,7 @@ library(dff) {
     }
     pin(Q) {
       direction : output ;
-      function : "IQ" ;
+      function : IQ ;
     }
   }
 }
diff --git a/tests/liberty/dff.lib.verilogsim.ok b/tests/liberty/dff.lib.verilogsim.ok
index 46441d0fc..4f2a5750c 100644
--- a/tests/liberty/dff.lib.verilogsim.ok
+++ b/tests/liberty/dff.lib.verilogsim.ok
@@ -3,10 +3,10 @@ module dff (D, CLK, Q);
   input D;
   input CLK;
   output Q;
-  assign Q = IQ; // "IQ"
+  assign Q = IQ; // IQ
   always @(posedge CLK) begin
       // "(D)"
-      "IQ" <= (D);
-      "IQN" <= ~((D));
+      "IQ" <= D;
+      "IQN" <= ~(D);
   end
 endmodule
diff --git a/tests/liberty/normal.lib.verilogsim.ok b/tests/liberty/normal.lib.verilogsim.ok
index 85aed5f4e..190ecd285 100644
--- a/tests/liberty/normal.lib.verilogsim.ok
+++ b/tests/liberty/normal.lib.verilogsim.ok
@@ -1,13 +1,13 @@
 module inv (A, Y);
   input A;
   output Y;
-  assign Y = ~A; // "A'"
+  assign Y = (~A); // "A'"
 endmodule
 module tri_inv (A, S, Z);
   input A;
   input S;
   output Z;
-  assign Z = ~A; // "A'"
+  assign Z = (~A); // "A'"
 endmodule
 module buffer (A, Y);
   input A;
@@ -18,26 +18,26 @@ module nand2 (A, B, Y);
   input A;
   input B;
   output Y;
-  assign Y = ~(A&B); // "(A * B)'"
+  assign Y = (~(A&B)); // "(A * B)'"
 endmodule
 module nor2 (A, B, Y);
   input A;
   input B;
   output Y;
-  assign Y = ~(A|B); // "(A + B)'"
+  assign Y = (~(A|B)); // "(A + B)'"
 endmodule
 module xor2 (A, B, Y);
   input A;
   input B;
   output Y;
-  assign Y = (A&~B)|(~A&B); // "(A *B') + (A' * B)"
+  assign Y = ((A&(~B))|((~A)&B)); // "(A *B') + (A' * B)"
 endmodule
 module imux2 (A, B, S, Y);
   input A;
   input B;
   input S;
   output Y;
-  assign Y = ~(&(A&S)|(B&~S)&); // "( (A * S) + (B * S') )'"
+  assign Y = (~((A&S)|(B&(~S)))); // "( (A * S) + (B * S') )'"
 endmodule
 module dff (D, CLK, RESET, PRESET, Q, QN);
   reg "IQ", "IQN";
@@ -89,14 +89,14 @@ module aoi211 (A, B, C, Y);
   input B;
   input C;
   output Y;
-  assign Y = ~((A&B)|C); // "((A * B) + C)'"
+  assign Y = (~((A&B)|C)); // "((A * B) + C)'"
 endmodule
 module oai211 (A, B, C, Y);
   input A;
   input B;
   input C;
   output Y;
-  assign Y = ~((A|B)&C); // "((A + B) * C)'"
+  assign Y = (~((A|B)&C)); // "((A + B) * C)'"
 endmodule
 module halfadder (A, B, C, Y);
   input A;
@@ -104,7 +104,7 @@ module halfadder (A, B, C, Y);
   output C;
   assign C = (A&B); // "(A * B)"
   output Y;
-  assign Y = (A&~B)|(~A&B); // "(A *B') + (A' * B)"
+  assign Y = ((A&(~B))|((~A)&B)); // "(A *B') + (A' * B)"
 endmodule
 module fulladder (A, B, CI, CO, Y);
   input A;
diff --git a/tests/liberty/unquoted.lib b/tests/liberty/unquoted.lib
new file mode 100644
index 000000000..c2bf538d2
--- /dev/null
+++ b/tests/liberty/unquoted.lib
@@ -0,0 +1,60 @@
+library(dff_unquoted) {
+  cell (dff1) {
+    area : 1;
+    ff("IQ", "IQN") {
+      next_state : !D;
+      clocked_on : (CLK);
+    }
+    pin(D) {
+      direction : input;
+    }
+    pin(CLK) {
+      direction : input;
+    }
+    pin(Q) {
+      direction: output;
+      function : IQ;
+    }
+  }
+  cell (dff2) {
+    area : 1;
+    ff(IQ, IQN) {
+      next_state : D';
+      clocked_on : CLK;
+    }
+    pin(D) {
+      direction : input;
+    }
+    pin(CLK) {
+      direction : input;
+    }
+    pin(Q) {
+      direction: output;
+      function : "IQ";
+    }
+  }
+  cell (dffe) {
+    area : 6;
+    ff("IQ", "IQN") {
+      next_state : (D&EN) | (IQ&!EN);
+      clocked_on : !CLK;
+    }
+    pin(D) {
+      direction : input;
+    }
+    pin(EN) {
+      direction : input;
+    }
+    pin(CLK) {
+      direction : input;
+    }
+    pin(Q) {
+      direction: output;
+      function : "IQ";
+    }
+    pin(QN) {
+      direction: output;
+      function : "IQN";
+    }
+  }
+}
diff --git a/tests/liberty/unquoted.lib.filtered.ok b/tests/liberty/unquoted.lib.filtered.ok
new file mode 100644
index 000000000..0ffc157b4
--- /dev/null
+++ b/tests/liberty/unquoted.lib.filtered.ok
@@ -0,0 +1,60 @@
+library(dff_unquoted) {
+  cell(dff1) {
+    area : 1 ;
+    ff("IQ", "IQN") {
+      next_state : !D ;
+      clocked_on :  ( CLK ) ;
+    }
+    pin(D) {
+      direction : input ;
+    }
+    pin(CLK) {
+      direction : input ;
+    }
+    pin(Q) {
+      direction : output ;
+      function : IQ ;
+    }
+  }
+  cell(dff2) {
+    area : 1 ;
+    ff(IQ, IQN) {
+      next_state : D ' ;
+      clocked_on : CLK ;
+    }
+    pin(D) {
+      direction : input ;
+    }
+    pin(CLK) {
+      direction : input ;
+    }
+    pin(Q) {
+      direction : output ;
+      function : "IQ" ;
+    }
+  }
+  cell(dffe) {
+    area : 6 ;
+    ff("IQ", "IQN") {
+      next_state :  ( D & EN ) | ( IQ & ! EN ) ;
+      clocked_on : !CLK ;
+    }
+    pin(D) {
+      direction : input ;
+    }
+    pin(EN) {
+      direction : input ;
+    }
+    pin(CLK) {
+      direction : input ;
+    }
+    pin(Q) {
+      direction : output ;
+      function : "IQ" ;
+    }
+    pin(QN) {
+      direction : output ;
+      function : "IQN" ;
+    }
+  }
+}
diff --git a/tests/liberty/unquoted.lib.verilogsim.ok b/tests/liberty/unquoted.lib.verilogsim.ok
new file mode 100644
index 000000000..8706d1773
--- /dev/null
+++ b/tests/liberty/unquoted.lib.verilogsim.ok
@@ -0,0 +1,39 @@
+module dff1 (D, CLK, Q);
+  reg "IQ", "IQN";
+  input D;
+  input CLK;
+  output Q;
+  assign Q = IQ; // IQ
+  always @(posedge CLK) begin
+      // !D
+      "IQ" <= (~D);
+      "IQN" <= ~((~D));
+  end
+endmodule
+module dff2 (D, CLK, Q);
+  reg IQ, IQN;
+  input D;
+  input CLK;
+  output Q;
+  assign Q = IQ; // "IQ"
+  always @(posedge CLK) begin
+      // D '
+      IQ <= (~D);
+      IQN <= ~((~D));
+  end
+endmodule
+module dffe (D, EN, CLK, Q, QN);
+  reg "IQ", "IQN";
+  input D;
+  input EN;
+  input CLK;
+  output Q;
+  assign Q = IQ; // "IQ"
+  output QN;
+  assign QN = IQN; // "IQN"
+  always @(posedge (~CLK)) begin
+      //  ( D & EN ) | ( IQ & ! EN )
+      "IQ" <= ((D&EN)|(IQ&(~EN)));
+      "IQN" <= ~(((D&EN)|(IQ&(~EN))));
+  end
+endmodule