diff --git a/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-as-literal.ifc b/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-as-literal.ifc
new file mode 100644
index 0000000000..44454937eb
--- /dev/null
+++ b/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-as-literal.ifc
@@ -0,0 +1,10 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
+FILE_NAME('qset.ifc','2024-11-15T12:05:44+05:00',(''),(''),'IfcOpenShell 0.0.0','Bonsai 0.8.1-alpha241113-d3333fe','Nobody');
+FILE_SCHEMA(('IFC2X3'));
+ENDSEC;
+DATA;
+#1=IFCPROPERTYSINGLEVALUE('InstallationDate',$,0.2,$);
+ENDSEC;
+END-ISO-10303-21;
\ No newline at end of file
diff --git a/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-empty-typed-value.ifc b/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-empty-typed-value.ifc
new file mode 100644
index 0000000000..0f16f1009c
--- /dev/null
+++ b/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-empty-typed-value.ifc
@@ -0,0 +1,10 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
+FILE_NAME('qset.ifc','2024-11-15T12:05:44+05:00',(''),(''),'IfcOpenShell 0.0.0','Bonsai 0.8.1-alpha241113-d3333fe','Nobody');
+FILE_SCHEMA(('IFC2X3'));
+ENDSEC;
+DATA;
+#1=IFCPROPERTYSINGLEVALUE('InstallationDate',$,IFCREAL(),$);
+ENDSEC;
+END-ISO-10303-21;
\ No newline at end of file
diff --git a/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-non-existant-type.ifc b/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-non-existant-type.ifc
new file mode 100644
index 0000000000..f305a8cffe
--- /dev/null
+++ b/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-non-existant-type.ifc
@@ -0,0 +1,10 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
+FILE_NAME('qset.ifc','2024-11-15T12:05:44+05:00',(''),(''),'IfcOpenShell 0.0.0','Bonsai 0.8.1-alpha241113-d3333fe','Nobody');
+FILE_SCHEMA(('IFC2X3'));
+ENDSEC;
+DATA;
+#1=IFCPROPERTYSINGLEVALUE('InstallationDate',$,IFCNONEXISTANTTYPE(0.1),$);
+ENDSEC;
+END-ISO-10303-21;
\ No newline at end of file
diff --git a/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-wrong-literal.ifc b/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-wrong-literal.ifc
new file mode 100644
index 0000000000..ecdf307868
--- /dev/null
+++ b/src/ifcopenshell-python/test/fixtures/validate/fail-selected-simple-type-wrong-literal.ifc
@@ -0,0 +1,10 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
+FILE_NAME('qset.ifc','2024-11-15T12:05:44+05:00',(''),(''),'IfcOpenShell 0.0.0','Bonsai 0.8.1-alpha241113-d3333fe','Nobody');
+FILE_SCHEMA(('IFC2X3'));
+ENDSEC;
+DATA;
+#1=IFCPROPERTYSINGLEVALUE('InstallationDate',$,IFCLABEL(0.5),$);
+ENDSEC;
+END-ISO-10303-21;
\ No newline at end of file
diff --git a/src/ifcopenshell-python/test/fixtures/validate/fail-simple-type-as-typed-value.ifc b/src/ifcopenshell-python/test/fixtures/validate/fail-simple-type-as-typed-value.ifc
new file mode 100644
index 0000000000..e763b7e792
--- /dev/null
+++ b/src/ifcopenshell-python/test/fixtures/validate/fail-simple-type-as-typed-value.ifc
@@ -0,0 +1,10 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
+FILE_NAME('qset.ifc','2024-11-15T12:05:44+05:00',(''),(''),'IfcOpenShell 0.0.0','Bonsai 0.8.1-alpha241113-d3333fe','Nobody');
+FILE_SCHEMA(('IFC2X3'));
+ENDSEC;
+DATA;
+#1=IFCQUANTITYAREA('GSA BIM Area',$,$,IFCAREAMEASURE(5.415819401311199));
+ENDSEC;
+END-ISO-10303-21;
\ No newline at end of file
diff --git a/src/ifcopenshell-python/test/fixtures/validate/pass-selected-simple-type.ifc b/src/ifcopenshell-python/test/fixtures/validate/pass-selected-simple-type.ifc
new file mode 100644
index 0000000000..ff36007465
--- /dev/null
+++ b/src/ifcopenshell-python/test/fixtures/validate/pass-selected-simple-type.ifc
@@ -0,0 +1,10 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
+FILE_NAME('qset.ifc','2024-11-15T12:05:44+05:00',(''),(''),'IfcOpenShell 0.0.0','Bonsai 0.8.1-alpha241113-d3333fe','Nobody');
+FILE_SCHEMA(('IFC2X3'));
+ENDSEC;
+DATA;
+#6=IFCPROPERTYSINGLEVALUE('InstallationDate',$,IFCLABEL('InstallationDate'),$);
+ENDSEC;
+END-ISO-10303-21;
\ No newline at end of file
diff --git a/src/ifcopenshell-python/test/fixtures/validate/pass-simple-type-as-float-literal.ifc b/src/ifcopenshell-python/test/fixtures/validate/pass-simple-type-as-float-literal.ifc
new file mode 100644
index 0000000000..bbc39907c0
--- /dev/null
+++ b/src/ifcopenshell-python/test/fixtures/validate/pass-simple-type-as-float-literal.ifc
@@ -0,0 +1,10 @@
+ISO-10303-21;
+HEADER;
+FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
+FILE_NAME('qset.ifc','2024-11-15T12:05:44+05:00',(''),(''),'IfcOpenShell 0.0.0','Bonsai 0.8.1-alpha241113-d3333fe','Nobody');
+FILE_SCHEMA(('IFC2X3'));
+ENDSEC;
+DATA;
+#8786=IFCQUANTITYAREA('GSA BIM Area',$,$,5.415819401311199);
+ENDSEC;
+END-ISO-10303-21;
\ No newline at end of file