diff --git a/backends/verilog/verilog_backend.cc b/backends/verilog/verilog_backend.cc
index 8da3c0627..fc38afbda 100644
--- a/backends/verilog/verilog_backend.cc
+++ b/backends/verilog/verilog_backend.cc
@@ -126,6 +126,33 @@ std::string id(RTLIL::IdString internal_id, bool may_rename = true)
 		break;
 	}
 
+	const pool<string> keywords = {
+		// IEEE 1800-2017 Annex B
+		"accept_on", "alias", "always", "always_comb", "always_ff", "always_latch", "and", "assert", "assign", "assume", "automatic", "before",
+		"begin", "bind", "bins", "binsof", "bit", "break", "buf", "bufif0", "bufif1", "byte", "case", "casex", "casez", "cell", "chandle",
+		"checker", "class", "clocking", "cmos", "config", "const", "constraint", "context", "continue", "cover", "covergroup", "coverpoint",
+		"cross", "deassign", "default", "defparam", "design", "disable", "dist", "do", "edge", "else", "end", "endcase", "endchecker",
+		"endclass", "endclocking", "endconfig", "endfunction", "endgenerate", "endgroup", "endinterface", "endmodule", "endpackage",
+		"endprimitive", "endprogram", "endproperty", "endsequence", "endspecify", "endtable", "endtask", "enum", "event", "eventually",
+		"expect", "export", "extends", "extern", "final", "first_match", "for", "force", "foreach", "forever", "fork", "forkjoin", "function",
+		"generate", "genvar", "global", "highz0", "highz1", "if", "iff", "ifnone", "ignore_bins", "illegal_bins", "implements", "implies",
+		"import", "incdir", "include", "initial", "inout", "input", "inside", "instance", "int", "integer", "interconnect", "interface",
+		"intersect", "join", "join_any", "join_none", "large", "let", "liblist", "library", "local", "localparam", "logic", "longint",
+		"macromodule", "matches", "medium", "modport", "module", "nand", "negedge", "nettype", "new", "nexttime", "nmos", "nor",
+		"noshowcancelled", "not", "notif0", "notif1", "null", "or", "output", "package", "packed", "parameter", "pmos", "posedge", "primitive",
+		"priority", "program", "property", "protected", "pull0", "pull1", "pulldown", "pullup", "pulsestyle_ondetect", "pulsestyle_onevent",
+		"pure", "rand", "randc", "randcase", "randsequence", "rcmos", "real", "realtime", "ref", "reg", "reject_on", "release", "repeat",
+		"restrict", "return", "rnmos", "rpmos", "rtran", "rtranif0", "rtranif1", "s_always", "s_eventually", "s_nexttime", "s_until",
+		"s_until_with", "scalared", "sequence", "shortint", "shortreal", "showcancelled", "signed", "small", "soft", "solve", "specify",
+		"specparam", "static", "string", "strong", "strong0", "strong1", "struct", "super", "supply0", "supply1", "sync_accept_on",
+		"sync_reject_on", "table", "tagged", "task", "this", "throughout", "time", "timeprecision", "timeunit", "tran", "tranif0", "tranif1",
+		"tri", "tri0", "tri1", "triand", "trior", "trireg", "type", "typedef", "union", "unique", "unique0", "unsigned", "until", "until_with",
+		"untyped", "use", "uwire", "var", "vectored", "virtual", "void", "wait", "wait_order", "wand", "weak", "weak0", "weak1", "while",
+		"wildcard", "wire", "with", "within", "wor", "xnor", "xor",
+	};
+	if (keywords.count(str))
+		do_escape = true;
+
 	if (do_escape)
 		return "\\" + std::string(str) + " ";
 	return std::string(str);
diff --git a/tests/asicworld/code_hdl_models_misc1.v b/tests/asicworld/code_hdl_models_misc1.v
deleted file mode 100644
index e3d9d5d64..000000000
--- a/tests/asicworld/code_hdl_models_misc1.v
+++ /dev/null
@@ -1,22 +0,0 @@
-module misc1 (a,b,c,d,y);
-input a, b,c,d;
-output y;
-
-wire net1,net2,net3;
-
-supply1 vdd;
-supply0 vss;
-
-// y = !((a+b+c).d)
-
-pmos p1 (vdd,net1,a);
-pmos p2 (net1,net2,b);
-pmos p3 (net2,y,c);
-pmos p4 (vdd,y,d);
-
-nmos n1 (vss,net3,a);
-nmos n2 (vss,net3,b);
-nmos n3 (vss,net3,c);
-nmos n4 (net3,y,d);
-
-endmodule
diff --git a/tests/asicworld/code_hdl_models_mux21_switch.v b/tests/asicworld/code_hdl_models_mux21_switch.v
deleted file mode 100644
index 519c07fc5..000000000
--- a/tests/asicworld/code_hdl_models_mux21_switch.v
+++ /dev/null
@@ -1,22 +0,0 @@
-//-----------------------------------------------------
-// Design Name : mux21_switch
-// File Name   : mux21_switch.v
-// Function    : 2:1 Mux using Switch Primitives
-// Coder       : Deepak Kumar Tala
-//-----------------------------------------------------
-module mux21_switch (out, ctrl, in1, in2);
-   
-   output out;                    
-   input  ctrl, in1, in2;         
-   wire          w;            
-
-   supply1 power;             
-   supply0 ground;      
-   
-   pmos N1 (w, power, ctrl);     
-   nmos N2 (w, ground, ctrl);   
-   
-   cmos C1 (out, in1, w, ctrl);   
-   cmos C2 (out, in2, ctrl, w);
-   
-endmodule
diff --git a/tests/asicworld/code_hdl_models_nand_switch.v b/tests/asicworld/code_hdl_models_nand_switch.v
deleted file mode 100644
index 1ccdd3a7c..000000000
--- a/tests/asicworld/code_hdl_models_nand_switch.v
+++ /dev/null
@@ -1,14 +0,0 @@
-module nand_switch(a,b,out);
-input a,b;
-output out;
-
-supply0 vss;
-supply1 vdd;
-wire net1;
-
-pmos p1 (vdd,out,a);
-pmos p2 (vdd,out,b);
-nmos n1 (vss,net1,a);
-nmos n2 (net1,out,b);
-
-endmodule
\ No newline at end of file
diff --git a/tests/asicworld/code_hdl_models_t_gate_switch.v b/tests/asicworld/code_hdl_models_t_gate_switch.v
deleted file mode 100644
index 5a7e0eaff..000000000
--- a/tests/asicworld/code_hdl_models_t_gate_switch.v
+++ /dev/null
@@ -1,11 +0,0 @@
-module t_gate_switch (L,R,nC,C);
- inout L;
- inout R;
- input nC;
- input C;
-
- //Syntax: keyword unique_name (drain. source, gate);
- pmos p1 (L,R,nC);
- nmos p2 (L,R,C);
-
-endmodule