diff --git a/src/V3AstNodeOther.h b/src/V3AstNodeOther.h
index 1308818be..b08033033 100644
--- a/src/V3AstNodeOther.h
+++ b/src/V3AstNodeOther.h
@@ -2458,12 +2458,6 @@ public:
     bool isWor() const { return varType().isWor(); }
     bool isWiredNet() const { return varType().isWiredNet(); }
     bool isTemp() const { return varType().isTemp(); }
-    bool isToggleCoverable() const {
-        return ((isIO() || isSignal())
-                && (isIO() || isBitLogic())
-                // Wrapper would otherwise duplicate wrapped module's coverage
-                && !isSc() && !isPrimaryIO() && !isConst() && !isDouble() && !isString());
-    }
     bool isClassMember() const { return varType() == VVarType::MEMBER; }
     bool isVirtIface() const {
         if (AstIfaceRefDType* const dtp = VN_CAST(dtypep(), IfaceRefDType)) {
diff --git a/src/V3Coverage.cpp b/src/V3Coverage.cpp
index 6d1ff5bc1..12bb973dc 100644
--- a/src/V3Coverage.cpp
+++ b/src/V3Coverage.cpp
@@ -166,10 +166,13 @@ class CoverageVisitor final : public VNVisitor {
 
     // METHODS
 
+    // Return non-nullptr reason if this variable shouldn't have toggle coverage
     const char* varIgnoreToggle(const AstVar* nodep) {
-        // Return true if this shouldn't be traced
-        // See also similar rule in V3TraceDecl::varIgnoreTrace
-        if (!nodep->isToggleCoverable()) return "Not relevant signal type";
+        const bool cover = nodep->isIO() || (nodep->isSignal() && nodep->isBitLogic());
+        if (!cover) return "Not relevant signal";
+        if (nodep->isConst()) return "Signal is constant";
+        if (nodep->isDouble()) return "Signal is double";
+        if (nodep->isString()) return "Signal is string";
         if (!v3Global.opt.coverageUnderscore()) {
             const string prettyName = nodep->prettyName();
             if (prettyName[0] == '_') return "Leading underscore";