diff --git a/cpp/ql/test/duplication-tests/constants/constants.cpp b/cpp/ql/test/duplication-tests/constants/constants.cpp
deleted file mode 100644
index c42a59813879..000000000000
--- a/cpp/ql/test/duplication-tests/constants/constants.cpp
+++ /dev/null
@@ -1,12 +0,0 @@
-
-int x = int();
-float y = float();
-double z = double();
-
-/* This produces a getValueText() of 0 for R() in line 9, which is debatable.  */
-struct R {};
-struct S {
-  S() : S(R()) { }
-  S(R) { }
-};
-S s;
diff --git a/cpp/ql/test/duplication-tests/constants/expr.expected b/cpp/ql/test/duplication-tests/constants/expr.expected
deleted file mode 100644
index e860f867a109..000000000000
--- a/cpp/ql/test/duplication-tests/constants/expr.expected
+++ /dev/null
@@ -1,4 +0,0 @@
-| constants.cpp:2:9:2:13 | 0 | int() |
-| constants.cpp:3:11:3:17 | 0.0 | float() |
-| constants.cpp:4:12:4:19 | 0.0 | double() |
-| constants.cpp:9:11:9:13 | 0 | 0 |
diff --git a/cpp/ql/test/duplication-tests/constants/expr.ql b/cpp/ql/test/duplication-tests/constants/expr.ql
deleted file mode 100644
index 09d745df82eb..000000000000
--- a/cpp/ql/test/duplication-tests/constants/expr.ql
+++ /dev/null
@@ -1,4 +0,0 @@
-import cpp
-
-from Expr e
-select e, e.getValueText()
diff --git a/cpp/ql/test/duplication-tests/duplicate_functions/FLinesOfDuplicatedCode.expected b/cpp/ql/test/duplication-tests/duplicate_functions/FLinesOfDuplicatedCode.expected
deleted file mode 100644
index 2a106a36d6b9..000000000000
--- a/cpp/ql/test/duplication-tests/duplicate_functions/FLinesOfDuplicatedCode.expected
+++ /dev/null
@@ -1,2 +0,0 @@
-| duplicate_functions.cpp:0:0:0:0 | duplicate_functions.cpp | 42 |
-| file://:0:0:0:0 |  | 0 |
diff --git a/cpp/ql/test/duplication-tests/duplicate_functions/FLinesOfDuplicatedCode.qlref b/cpp/ql/test/duplication-tests/duplicate_functions/FLinesOfDuplicatedCode.qlref
deleted file mode 100644
index 7e9bdfa57f7c..000000000000
--- a/cpp/ql/test/duplication-tests/duplicate_functions/FLinesOfDuplicatedCode.qlref
+++ /dev/null
@@ -1 +0,0 @@
-Metrics/Files/FLinesOfDuplicatedCode.ql
diff --git a/cpp/ql/test/duplication-tests/duplicate_functions/duplicate_functions.cpp b/cpp/ql/test/duplication-tests/duplicate_functions/duplicate_functions.cpp
deleted file mode 100644
index d31bfa2d90ff..000000000000
--- a/cpp/ql/test/duplication-tests/duplicate_functions/duplicate_functions.cpp
+++ /dev/null
@@ -1,47 +0,0 @@
-int x;
-
-void Void1()
-{
-  x = 0;
-  x = 1;
-  x = 2;
-  x = 3;
-  x = 4;
-  x = 5;
-  x = 6;
-}
-
-void Void2()
-{
-  x = 0;
-  x = 1;
-  x = 2;
-  x = 3;
-  x = 4;
-  x = 5;
-  x = 6;
-}
-
-int Int1()
-{
-  x = 0;
-  ++x;
-  ++x;
-  --x;
-  --x;
-  ++x;
-  --x;
-  return x;
-}
-
-int Int2()
-{
-  x = 0;
-  ++x;
-  ++x;
-  --x;
-  --x;
-  ++x;
-  --x;
-  return x;
-}
diff --git a/cpp/ql/test/duplication-tests/duplicate_functions/duplicate_functions.expected b/cpp/ql/test/duplication-tests/duplicate_functions/duplicate_functions.expected
deleted file mode 100644
index d31c0b9d72d6..000000000000
--- a/cpp/ql/test/duplication-tests/duplicate_functions/duplicate_functions.expected
+++ /dev/null
@@ -1,4 +0,0 @@
-| duplicate_functions.cpp:3:6:3:10 | definition of Void1 | Function Void1 is duplicated at $@. | duplicate_functions.cpp:14:6:14:10 | definition of Void2 | duplicate_functions.cpp:14 |
-| duplicate_functions.cpp:14:6:14:10 | definition of Void2 | Function Void2 is duplicated at $@. | duplicate_functions.cpp:3:6:3:10 | definition of Void1 | duplicate_functions.cpp:3 |
-| duplicate_functions.cpp:25:5:25:8 | definition of Int1 | Function Int1 is duplicated at $@. | duplicate_functions.cpp:37:5:37:8 | definition of Int2 | duplicate_functions.cpp:37 |
-| duplicate_functions.cpp:37:5:37:8 | definition of Int2 | Function Int2 is duplicated at $@. | duplicate_functions.cpp:25:5:25:8 | definition of Int1 | duplicate_functions.cpp:25 |
diff --git a/cpp/ql/test/duplication-tests/duplicate_functions/duplicate_functions.qlref b/cpp/ql/test/duplication-tests/duplicate_functions/duplicate_functions.qlref
deleted file mode 100644
index bb7e3a454178..000000000000
--- a/cpp/ql/test/duplication-tests/duplicate_functions/duplicate_functions.qlref
+++ /dev/null
@@ -1 +0,0 @@
-external/DuplicateFunction.ql
diff --git a/cpp/ql/test/duplication-tests/tokenising/FLinesOfDuplicatedCode.expected b/cpp/ql/test/duplication-tests/tokenising/FLinesOfDuplicatedCode.expected
deleted file mode 100644
index d79f7cfd0864..000000000000
--- a/cpp/ql/test/duplication-tests/tokenising/FLinesOfDuplicatedCode.expected
+++ /dev/null
@@ -1,2 +0,0 @@
-| test.c:0:0:0:0 | test.c | 10 |
-| file://:0:0:0:0 |  | 0 |
diff --git a/cpp/ql/test/duplication-tests/tokenising/FLinesOfDuplicatedCode.qlref b/cpp/ql/test/duplication-tests/tokenising/FLinesOfDuplicatedCode.qlref
deleted file mode 100644
index 7e9bdfa57f7c..000000000000
--- a/cpp/ql/test/duplication-tests/tokenising/FLinesOfDuplicatedCode.qlref
+++ /dev/null
@@ -1 +0,0 @@
-Metrics/Files/FLinesOfDuplicatedCode.ql
diff --git a/cpp/ql/test/duplication-tests/tokenising/duplications.expected b/cpp/ql/test/duplication-tests/tokenising/duplications.expected
deleted file mode 100644
index a882f18620ba..000000000000
--- a/cpp/ql/test/duplication-tests/tokenising/duplications.expected
+++ /dev/null
@@ -1 +0,0 @@
-| 2 |
diff --git a/cpp/ql/test/duplication-tests/tokenising/duplications.ql b/cpp/ql/test/duplication-tests/tokenising/duplications.ql
deleted file mode 100644
index ea0b688a82cb..000000000000
--- a/cpp/ql/test/duplication-tests/tokenising/duplications.ql
+++ /dev/null
@@ -1,5 +0,0 @@
-import cpp
-
-// Provided tokenisation succeeded, we ought to have some
-// @duplication rows.
-select count(@duplication d)
diff --git a/cpp/ql/test/duplication-tests/tokenising/test.c b/cpp/ql/test/duplication-tests/tokenising/test.c
deleted file mode 100644
index c7c0b991a66a..000000000000
--- a/cpp/ql/test/duplication-tests/tokenising/test.c
+++ /dev/null
@@ -1,18 +0,0 @@
-
-#define foo "/*bar"
-#define bar aaa \ bbb
-
-int i;
-
-void f(void) {
-    i = 1;
-    i = 2;
-    i = 3;
-}
-
-void g(void) {
-    i = 1;
-    i = 2;
-    i = 3;
-}
-