diff --git a/Makefile.am b/Makefile.am
index 1fb61a6..48dd1f0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -68,6 +68,9 @@ EXTRA_DIST =	pkg.m4 \
 		tests/lib1/fragment-quoting.pc \
 		tests/lib1/fragment-quoting-2.pc \
 		tests/lib1/fragment-quoting-3.pc \
+		tests/lib1/fragment-quoting-4.pc \
+		tests/lib1/fragment-quoting-5.pc \
+		tests/lib1/fragment-quoting-6.pc \
 		tests/test_env.sh \
 		$(test_scripts) \
 		doc/conf.py \
diff --git a/tests/lib1/fragment-quoting-4.pc b/tests/lib1/fragment-quoting-4.pc
new file mode 100644
index 0000000..f35e0ed
--- /dev/null
+++ b/tests/lib1/fragment-quoting-4.pc
@@ -0,0 +1,10 @@
+prefix=/test
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: fragment-quoting-4
+Description: A testing pkg-config file
+Version: 1.2.3
+Cflags: -fPIC -I${includedir}/foo -DQUOTED="'${prefix}/share/doc'"
+Cflags.private: -DFOO_STATIC
diff --git a/tests/lib1/fragment-quoting-5.pc b/tests/lib1/fragment-quoting-5.pc
new file mode 100644
index 0000000..22df0b3
--- /dev/null
+++ b/tests/lib1/fragment-quoting-5.pc
@@ -0,0 +1,10 @@
+prefix=/test
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: fragment-quoting-5
+Description: A testing pkg-config file
+Version: 1.2.3
+Cflags: -fPIC -I${includedir}/foo -DQUOTED='${prefix}/share/doc'
+Cflags.private: -DFOO_STATIC
diff --git a/tests/lib1/fragment-quoting-6.pc b/tests/lib1/fragment-quoting-6.pc
new file mode 100644
index 0000000..191acd9
--- /dev/null
+++ b/tests/lib1/fragment-quoting-6.pc
@@ -0,0 +1,10 @@
+prefix=/test
+exec_prefix=${prefix}
+libdir=${prefix}/lib
+includedir=${prefix}/include
+
+Name: fragment-quoting-6
+Description: A testing pkg-config file
+Version: 1.2.3
+Cflags: -fPIC -I${includedir}/foo -DQUOTED=\'${prefix}/share/doc\'
+Cflags.private: -DFOO_STATIC
diff --git a/tests/parser.sh b/tests/parser.sh
index 9f1fcdb..ed7bb9c 100755
--- a/tests/parser.sh
+++ b/tests/parser.sh
@@ -21,7 +21,10 @@ tests_init \
 	variable_whitespace \
 	fragment_quoting \
 	fragment_quoting_2 \
-	fragment_quoting_3
+	fragment_quoting_3 \
+	fragment_quoting_4 \
+	fragment_quoting_5 \
+	fragment_quoting_6
 
 comments_body()
 {
@@ -179,3 +182,27 @@ fragment_quoting_3_body()
 		-o inline:"-fPIC -I/test/include/foo -DQUOTED=\\\"/test/share/doc\\\" \n" \
 		pkgconf --cflags fragment-quoting-3
 }
+
+fragment_quoting_4_body()
+{
+	export PKG_CONFIG_PATH="${selfdir}/lib1"
+	atf_check \
+		-o inline:"-fPIC -I/test/include/foo -DQUOTED=\"'/test/share/doc'\" \n" \
+		pkgconf --cflags fragment-quoting-4
+}
+
+fragment_quoting_5_body()
+{
+	export PKG_CONFIG_PATH="${selfdir}/lib1"
+	atf_check \
+		-o inline:"-fPIC -I/test/include/foo -DQUOTED=/test/share/doc \n" \
+		pkgconf --cflags fragment-quoting-5
+}
+
+fragment_quoting_6_body()
+{
+	export PKG_CONFIG_PATH="${selfdir}/lib1"
+	atf_check \
+		-o inline:"-fPIC -I/test/include/foo -DQUOTED=\\\'/test/share/doc\\\' \n" \
+		pkgconf --cflags fragment-quoting-6
+}